mozilla-central/js/xpconnect/src/XPCComponents.cpp (file symbol)

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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/. */
/* The "Components" xpcom objects for JavaScript. */
#include "xpcprivate.h"
#include "xpc_make_class.h"
#include "XPCJSWeakReference.h"
#include "AccessCheck.h"
#include "WrapperFactory.h"
#include "nsJSUtils.h"
#include "mozJSModuleLoader.h"
#include "nsContentUtils.h"
#include "nsCycleCollector.h"
#include "jsfriendapi.h"
#include "js/Array.h" // JS::IsArrayObject
#include "js/CallAndConstruct.h" // JS::IsCallable, JS_CallFunctionName, JS_CallFunctionValue
#include "js/CharacterEncoding.h"
#include "js/friend/WindowProxy.h" // js::ToWindowProxyIfWindow
#include "js/Object.h" // JS::GetClass, JS::GetCompartment
#include "js/PropertyAndElement.h" // JS_DefineProperty, JS_DefinePropertyById, JS_Enumerate, JS_GetProperty, JS_GetPropertyById, JS_HasProperty, JS_SetProperty, JS_SetPropertyById
#include "js/SavedFrameAPI.h"
#include "js/StructuredClone.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/Attributes.h"
#include "mozilla/LoadContext.h"
#include "mozilla/Preferences.h"
#include "nsJSEnvironment.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/Try.h"
#include "mozilla/URLPreloader.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/DOMExceptionBinding.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/RemoteObjectProxy.h"
#include "mozilla/dom/StructuredCloneTags.h"
#include "mozilla/dom/WindowBinding.h"
#include "nsZipArchive.h"
#include "nsWindowMemoryReporter.h"
#include "nsICycleCollectorListener.h"
#include "nsIException.h"
#include "nsIScriptError.h"
#include "nsPIDOMWindow.h"
#include "nsGlobalWindowInner.h"
#include "nsScriptError.h"
#include "GeckoProfiler.h"
#include "ProfilerControl.h"
#include "mozilla/EditorSpellCheck.h"
#include "nsCommandLine.h"
#include "nsCommandParams.h"
#include "nsPersistentProperties.h"
#include "nsIDocumentEncoder.h"
using namespace mozilla;
using namespace JS;
using namespace js;
using namespace xpc;
using mozilla::dom::Exception;
/***************************************************************************/
// stuff used by all
nsresult xpc::ThrowAndFail(nsresult errNum, JSContext* cx, bool* retval) {
XPCThrower::Throw(errNum, cx);
*retval = false;
return NS_OK;
}
static bool JSValIsInterfaceOfType(JSContext* cx, HandleValue v, REFNSIID iid) {
nsCOMPtr<nsIXPConnectWrappedNative> wn;
nsCOMPtr<nsISupports> iface;
if (v.isPrimitive()) {
return false;
}
nsIXPConnect* xpc = nsIXPConnect::XPConnect();
RootedObject obj(cx, &v.toObject());
return NS_SUCCEEDED(
xpc->GetWrappedNativeOfJSObject(cx, obj, getter_AddRefs(wn))) &&
wn &&
NS_SUCCEEDED(
wn->Native()->QueryInterface(iid, getter_AddRefs(iface))) &&
iface;
}
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
class nsXPCComponents_Interfaces final : public nsIXPCComponents_Interfaces,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_INTERFACES
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_Interfaces();
private:
virtual ~nsXPCComponents_Interfaces();
};
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Interfaces),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_Interfaces");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_Interfaces::nsXPCComponents_Interfaces() = default;
nsXPCComponents_Interfaces::~nsXPCComponents_Interfaces() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_Interfaces, nsIXPCComponents_Interfaces,
nsIXPCScriptable, nsIClassInfo);
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Interfaces
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Interfaces"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_Interfaces::NewEnumerate(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj,
JS::MutableHandleIdVector properties,
bool enumerableOnly, bool* _retval) {
if (!properties.reserve(nsXPTInterfaceInfo::InterfaceCount())) {
*_retval = false;
return NS_OK;
}
for (uint32_t index = 0; index < nsXPTInterfaceInfo::InterfaceCount();
index++) {
const nsXPTInterfaceInfo* interface = nsXPTInterfaceInfo::ByIndex(index);
if (!interface) {
continue;
}
const char* name = interface->Name();
if (!name) {
continue;
}
RootedString idstr(cx, JS_NewStringCopyZ(cx, name));
if (!idstr) {
*_retval = false;
return NS_OK;
}
RootedId id(cx);
if (!JS_StringToId(cx, idstr, &id)) {
*_retval = false;
return NS_OK;
}
properties.infallibleAppend(id);
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Interfaces::Resolve(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg, jsid idArg,
bool* resolvedp, bool* _retval) {
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
if (!id.isString()) {
return NS_OK;
}
RootedString str(cx, id.toString());
JS::UniqueChars name = JS_EncodeStringToLatin1(cx, str);
// we only allow interfaces by name here
if (name && name[0] != '{') {
const nsXPTInterfaceInfo* info = nsXPTInterfaceInfo::ByName(name.get());
if (!info) {
return NS_OK;
}
RootedValue iidv(cx);
if (xpc::IfaceID2JSValue(cx, *info, &iidv)) {
*resolvedp = true;
*_retval = JS_DefinePropertyById(cx, obj, id, iidv,
JSPROP_ENUMERATE | JSPROP_READONLY |
JSPROP_PERMANENT | JSPROP_RESOLVING);
}
}
return NS_OK;
}
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
class nsXPCComponents_Classes final : public nsIXPCComponents_Classes,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_CLASSES
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_Classes();
private:
virtual ~nsXPCComponents_Classes();
};
/***************************************************************************/
NS_IMETHODIMP
nsXPCComponents_Classes::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Classes),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_Classes");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_Classes::nsXPCComponents_Classes() = default;
nsXPCComponents_Classes::~nsXPCComponents_Classes() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_Classes, nsIXPCComponents_Classes,
nsIXPCScriptable, nsIClassInfo)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Classes
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Classes"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_Classes::NewEnumerate(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj,
JS::MutableHandleIdVector properties,
bool enumerableOnly, bool* _retval) {
nsCOMPtr<nsIComponentRegistrar> compMgr;
if (NS_FAILED(NS_GetComponentRegistrar(getter_AddRefs(compMgr))) ||
!compMgr) {
return NS_ERROR_UNEXPECTED;
}
nsTArray<nsCString> contractIDs;
if (NS_FAILED(compMgr->GetContractIDs(contractIDs))) {
return NS_ERROR_UNEXPECTED;
}
for (const auto& name : contractIDs) {
RootedString idstr(cx, JS_NewStringCopyN(cx, name.get(), name.Length()));
if (!idstr) {
*_retval = false;
return NS_OK;
}
RootedId id(cx);
if (!JS_StringToId(cx, idstr, &id)) {
*_retval = false;
return NS_OK;
}
if (!properties.append(id)) {
*_retval = false;
return NS_OK;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Classes::Resolve(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg, jsid idArg,
bool* resolvedp, bool* _retval)
{
RootedId id(cx, idArg);
RootedObject obj(cx, objArg);
RootedValue cidv(cx);
if (id.isString() && xpc::ContractID2JSValue(cx, id.toString(), &cidv)) {
*resolvedp = true;
*_retval = JS_DefinePropertyById(cx, obj, id, cidv,
JSPROP_ENUMERATE | JSPROP_READONLY |
JSPROP_PERMANENT | JSPROP_RESOLVING);
}
return NS_OK;
}
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
// Currently the possible results do not change at runtime, so they are only
// cached once (unlike ContractIDs, CLSIDs, and IIDs)
class nsXPCComponents_Results final : public nsIXPCComponents_Results,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_RESULTS
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_Results();
private:
virtual ~nsXPCComponents_Results();
};
/***************************************************************************/
NS_IMETHODIMP
nsXPCComponents_Results::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Results),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_Results");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_Results::nsXPCComponents_Results() = default;
nsXPCComponents_Results::~nsXPCComponents_Results() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_Results, nsIXPCComponents_Results,
nsIXPCScriptable, nsIClassInfo)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Results
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Results"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_Results::NewEnumerate(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj,
JS::MutableHandleIdVector properties,
bool enumerableOnly, bool* _retval) {
const char* name;
const void* iter = nullptr;
while (nsXPCException::IterateNSResults(nullptr, &name, nullptr, &iter)) {
RootedString idstr(cx, JS_NewStringCopyZ(cx, name));
if (!idstr) {
*_retval = false;
return NS_OK;
}
RootedId id(cx);
if (!JS_StringToId(cx, idstr, &id)) {
*_retval = false;
return NS_OK;
}
if (!properties.append(id)) {
*_retval = false;
return NS_OK;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Results::Resolve(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg, jsid idArg,
bool* resolvedp, bool* _retval) {
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
if (!id.isString()) {
return NS_OK;
}
JS::UniqueChars name = JS_EncodeStringToLatin1(cx, id.toString());
if (name) {
const char* rv_name;
const void* iter = nullptr;
nsresult rv;
while (nsXPCException::IterateNSResults(&rv, &rv_name, nullptr, &iter)) {
if (!strcmp(name.get(), rv_name)) {
*resolvedp = true;
if (!JS_DefinePropertyById(cx, obj, id, (uint32_t)rv,
JSPROP_ENUMERATE | JSPROP_READONLY |
JSPROP_PERMANENT | JSPROP_RESOLVING)) {
return NS_ERROR_UNEXPECTED;
}
}
}
}
return NS_OK;
}
/***************************************************************************/
// JavaScript Constructor for nsIJSID objects (Components.ID)
class nsXPCComponents_ID final : public nsIXPCComponents_ID,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_ID
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_ID();
private:
virtual ~nsXPCComponents_ID();
static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, HandleObject obj,
const CallArgs& args, bool* _retval);
};
/***************************************************************************/
NS_IMETHODIMP
nsXPCComponents_ID::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_ID),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_ID");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_ID::nsXPCComponents_ID() = default;
nsXPCComponents_ID::~nsXPCComponents_ID() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_ID, nsIXPCComponents_ID, nsIXPCScriptable,
nsIClassInfo)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_ID
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_ID"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \
XPC_SCRIPTABLE_WANT_HASINSTANCE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_ID::Call(nsIXPConnectWrappedNative* wrapper, JSContext* cx,
JSObject* objArg, const CallArgs& args,
bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
NS_IMETHODIMP
nsXPCComponents_ID::Construct(nsIXPConnectWrappedNative* wrapper, JSContext* cx,
JSObject* objArg, const CallArgs& args,
bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
// static
nsresult nsXPCComponents_ID::CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, HandleObject obj,
const CallArgs& args,
bool* _retval) {
// make sure we have at least one arg
if (args.length() < 1) {
return ThrowAndFail(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx, _retval);
}
// Prevent non-chrome code from creating ID objects.
if (!nsContentUtils::IsCallerChrome()) {
return ThrowAndFail(NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED, cx, _retval);
}
// convert the first argument into a string and see if it looks like an id
JSString* jsstr = ToString(cx, args[0]);
if (!jsstr) {
return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval);
}
JS::UniqueChars bytes = JS_EncodeStringToLatin1(cx, jsstr);
if (!bytes) {
return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval);
}
nsID id;
if (!id.Parse(bytes.get())) {
return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval);
}
// make the new object and return it.
if (!xpc::ID2JSValue(cx, id, args.rval())) {
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_ID::HasInstance(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj, HandleValue val,
bool* bp, bool* _retval) {
if (bp) {
*bp = xpc::JSValue2ID(cx, val).isSome();
}
return NS_OK;
}
/***************************************************************************/
// JavaScript Constructor for Exception objects (Components.Exception)
class nsXPCComponents_Exception final : public nsIXPCComponents_Exception,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_EXCEPTION
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_Exception();
private:
virtual ~nsXPCComponents_Exception();
static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, HandleObject obj,
const CallArgs& args, bool* _retval);
};
/***************************************************************************/
NS_IMETHODIMP
nsXPCComponents_Exception::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Exception),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetClassDescription(nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_Exception");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_Exception::nsXPCComponents_Exception() = default;
nsXPCComponents_Exception::~nsXPCComponents_Exception() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_Exception, nsIXPCComponents_Exception,
nsIXPCScriptable, nsIClassInfo)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Exception
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Exception"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \
XPC_SCRIPTABLE_WANT_HASINSTANCE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_Exception::Call(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg,
const CallArgs& args, bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
NS_IMETHODIMP
nsXPCComponents_Exception::Construct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg,
const CallArgs& args, bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
struct MOZ_STACK_CLASS ExceptionArgParser {
ExceptionArgParser(JSContext* context, nsIXPConnect* xpconnect)
: eMsg("exception"),
eResult(NS_ERROR_FAILURE),
cx(context),
xpc(xpconnect) {}
// Public exception parameter values. During construction, these are
// initialized to the appropriate defaults.
const char* eMsg;
nsresult eResult;
nsCOMPtr<nsIStackFrame> eStack;
nsCOMPtr<nsISupports> eData;
// Parse the constructor arguments into the above |eFoo| parameter values.
bool parse(const CallArgs& args) {
/*
* The Components.Exception takes a series of arguments, all of them
* optional:
*
* Argument 0: Exception message (defaults to 'exception').
* Argument 1: Result code (defaults to NS_ERROR_FAILURE) _or_ options
* object (see below).
* Argument 2: Stack (defaults to the current stack, which we trigger
* by leaving this nullptr in the parser).
* Argument 3: Optional user data (defaults to nullptr).
*
* To dig our way out of this clunky API, we now support passing an
* options object as the second parameter (as opposed to a result code).
* If this is the case, all subsequent arguments are ignored, and the
* following properties are parsed out of the object (using the
* associated default if the property does not exist):
*
* result: Result code (see argument 1).
* stack: Call stack (see argument 2).
* data: User data (see argument 3).
*/
if (args.length() > 0 && !parseMessage(args[0])) {
return false;
}
if (args.length() > 1) {
if (args[1].isObject()) {
RootedObject obj(cx, &args[1].toObject());
return parseOptionsObject(obj);
}
if (!parseResult(args[1])) {
return false;
}
}
if (args.length() > 2) {
if (!parseStack(args[2])) {
return false;
}
}
if (args.length() > 3) {
if (!parseData(args[3])) {
return false;
}
}
return true;
}
protected:
/*
* Parsing helpers.
*/
bool parseMessage(HandleValue v) {
JSString* str = ToString(cx, v);
if (!str) {
return false;
}
messageBytes = JS_EncodeStringToLatin1(cx, str);
eMsg = messageBytes.get();
return !!eMsg;
}
bool parseResult(HandleValue v) {
return JS::ToUint32(cx, v, (uint32_t*)&eResult);
}
bool parseStack(HandleValue v) {
if (!v.isObject()) {
// eStack has already been initialized to null, which is what we want
// for any non-object values (including null).
return true;
}
RootedObject stackObj(cx, &v.toObject());
return NS_SUCCEEDED(xpc->WrapJS(cx, stackObj, NS_GET_IID(nsIStackFrame),
getter_AddRefs(eStack)));
}
bool parseData(HandleValue v) {
if (!v.isObject()) {
// eData has already been initialized to null, which is what we want
// for any non-object values (including null).
return true;
}
RootedObject obj(cx, &v.toObject());
return NS_SUCCEEDED(
xpc->WrapJS(cx, obj, NS_GET_IID(nsISupports), getter_AddRefs(eData)));
}
bool parseOptionsObject(HandleObject obj) {
RootedValue v(cx);
if (!getOption(obj, "result", &v) || (!v.isUndefined() && !parseResult(v)))
return false;
if (!getOption(obj, "stack", &v) || (!v.isUndefined() && !parseStack(v)))
return false;
if (!getOption(obj, "data", &v) || (!v.isUndefined() && !parseData(v)))
return false;
return true;
}
bool getOption(HandleObject obj, const char* name, MutableHandleValue rv) {
// Look for the property.
bool found;
if (!JS_HasProperty(cx, obj, name, &found)) {
return false;
}
// If it wasn't found, indicate with undefined.
if (!found) {
rv.setUndefined();
return true;
}
// Get the property.
return JS_GetProperty(cx, obj, name, rv);
}
/*
* Internal data members.
*/
// If there's a non-default exception string, hold onto the allocated bytes.
JS::UniqueChars messageBytes;
// Various bits and pieces that are helpful to have around.
JSContext* cx;
nsIXPConnect* xpc;
};
// static
nsresult nsXPCComponents_Exception::CallOrConstruct(
nsIXPConnectWrappedNative* wrapper, JSContext* cx, HandleObject obj,
const CallArgs& args, bool* _retval) {
nsIXPConnect* xpc = nsIXPConnect::XPConnect();
MOZ_DIAGNOSTIC_ASSERT(nsContentUtils::IsCallerChrome());
// Parse the arguments to the Exception constructor.
ExceptionArgParser parser(cx, xpc);
if (!parser.parse(args)) {
return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
}
RefPtr<Exception> e = new Exception(nsCString(parser.eMsg), parser.eResult,
""_ns, parser.eStack, parser.eData);
RootedObject newObj(cx);
if (NS_FAILED(xpc->WrapNative(cx, obj, e, NS_GET_IID(nsIException),
newObj.address())) ||
!newObj) {
return ThrowAndFail(NS_ERROR_XPC_CANT_CREATE_WN, cx, _retval);
}
args.rval().setObject(*newObj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Exception::HasInstance(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj,
HandleValue val, bool* bp,
bool* _retval) {
using namespace mozilla::dom;
if (bp) {
*bp = (val.isObject() && IS_INSTANCE_OF(Exception, &val.toObject())) ||
JSValIsInterfaceOfType(cx, val, NS_GET_IID(nsIException));
}
return NS_OK;
}
/*******************************************************/
// JavaScript Constructor for nsIXPCConstructor objects (Components.Constructor)
class nsXPCComponents_Constructor final : public nsIXPCComponents_Constructor,
public nsIXPCScriptable,
public nsIClassInfo {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCCOMPONENTS_CONSTRUCTOR
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSICLASSINFO
public:
nsXPCComponents_Constructor();
private:
virtual ~nsXPCComponents_Constructor();
static bool InnerConstructor(JSContext* cx, unsigned argc, JS::Value* vp);
static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, HandleObject obj,
const CallArgs& args, bool* _retval);
};
/***************************************************************************/
NS_IMETHODIMP
nsXPCComponents_Constructor::GetInterfaces(nsTArray<nsIID>& aArray) {
aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Constructor),
NS_GET_IID(nsIXPCScriptable)};
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetScriptableHelper(nsIXPCScriptable** retval) {
*retval = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetContractID(nsACString& aContractID) {
aContractID.SetIsVoid(true);
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetClassDescription(
nsACString& aClassDescription) {
aClassDescription.AssignLiteral("XPCComponents_Constructor");
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetClassID(nsCID** aClassID) {
*aClassID = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetFlags(uint32_t* aFlags) {
*aFlags = 0;
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
return NS_ERROR_NOT_AVAILABLE;
}
nsXPCComponents_Constructor::nsXPCComponents_Constructor() = default;
nsXPCComponents_Constructor::~nsXPCComponents_Constructor() {
// empty
}
NS_IMPL_ISUPPORTS(nsXPCComponents_Constructor, nsIXPCComponents_Constructor,
nsIXPCScriptable, nsIClassInfo)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Constructor
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Constructor"
#define XPC_MAP_FLAGS \
(XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \
XPC_SCRIPTABLE_WANT_HASINSTANCE | \
XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h" /* This will #undef the above */
// static
bool nsXPCComponents_Constructor::InnerConstructor(JSContext* cx, unsigned argc,
JS::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject callee(cx, &args.callee());
// Fetch the property name ids, so we can look them up.
XPCJSRuntime* runtime = XPCJSRuntime::Get();
HandleId classIDProp = runtime->GetStringID(XPCJSContext::IDX_CLASS_ID);
HandleId interfaceIDProp =
runtime->GetStringID(XPCJSContext::IDX_INTERFACE_ID);
HandleId initializerProp =
runtime->GetStringID(XPCJSContext::IDX_INITIALIZER);
// Get properties ('classID', 'interfaceID', and 'initializer') off the
// constructor object.
RootedValue classIDv(cx);
RootedValue interfaceID(cx);
RootedValue initializer(cx);
if (!JS_GetPropertyById(cx, callee, classIDProp, &classIDv) ||
!JS_GetPropertyById(cx, callee, interfaceIDProp, &interfaceID) ||
!JS_GetPropertyById(cx, callee, initializerProp, &initializer)) {
return false;
}
if (!classIDv.isObject() || !interfaceID.isObject()) {
XPCThrower::Throw(NS_ERROR_UNEXPECTED, cx);
return false;
}
// Call 'createInstance' on the 'classID' object to create the object.
RootedValue instancev(cx);
RootedObject classID(cx, &classIDv.toObject());
if (!JS_CallFunctionName(cx, classID, "createInstance",
HandleValueArray(interfaceID), &instancev)) {
return false;
}
if (!instancev.isObject()) {
XPCThrower::Throw(NS_ERROR_FAILURE, cx);
return false;
}
// Call the method 'initializer' on the instance, passing in our parameters.
if (!initializer.isUndefined()) {
RootedValue dummy(cx);
RootedValue initfunc(cx);
RootedId initid(cx);
RootedObject instance(cx, &instancev.toObject());
if (!JS_ValueToId(cx, initializer, &initid) ||
!JS_GetPropertyById(cx, instance, initid, &initfunc) ||
!JS_CallFunctionValue(cx, instance, initfunc, args, &dummy)) {
return false;
}
}
args.rval().set(instancev);
return true;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::Call(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg,
const CallArgs& args, bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
NS_IMETHODIMP
nsXPCComponents_Constructor::Construct(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* objArg,
const CallArgs& args, bool* _retval) {
RootedObject obj(cx, objArg);
return CallOrConstruct(wrapper, cx, obj, args, _retval);
}
// static
nsresult nsXPCComponents_Constructor::CallOrConstruct(
nsIXPConnectWrappedNative* wrapper, JSContext* cx, HandleObject obj,
const CallArgs& args, bool* _retval) {
// make sure we have at least one arg
if (args.length() < 1) {
return ThrowAndFail(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx, _retval);
}
// Fetch the property name ids, so we can look them up.
XPCJSRuntime* runtime = XPCJSRuntime::Get();
HandleId classIDProp = runtime->GetStringID(XPCJSContext::IDX_CLASS_ID);
HandleId interfaceIDProp =
runtime->GetStringID(XPCJSContext::IDX_INTERFACE_ID);
HandleId initializerProp =
runtime->GetStringID(XPCJSContext::IDX_INITIALIZER);
// get the various other object pointers we need
nsIXPConnect* xpc = nsIXPConnect::XPConnect();
XPCWrappedNativeScope* scope = ObjectScope(obj);
nsCOMPtr<nsIXPCComponents> comp;
if (!xpc || !scope || !(comp = scope->GetComponents())) {
return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
}
// Prevent non-chrome code from creating constructor objects.
if (!nsContentUtils::IsCallerChrome()) {
return ThrowAndFail(NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED, cx, _retval);
}
JSFunction* ctorfn = JS_NewFunction(cx, InnerConstructor, 0,
JSFUN_CONSTRUCTOR, "XPCOM_Constructor");
if (!ctorfn) {
return ThrowAndFail(NS_ERROR_OUT_OF_MEMORY, cx, _retval);
}
JS::RootedObject ctor(cx, JS_GetFunctionObject(ctorfn));
if (args.length() >= 3) {
// args[2] is an initializer function or property name
RootedString str(cx, ToString(cx, args[2]));
if (!JS_DefinePropertyById(
cx, ctor, initializerProp, str,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) {
return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval);
}
}
RootedString ifaceName(cx);
if (args.length() >= 2) {
ifaceName = ToString(cx, args[1]);
} else {
ifaceName = JS_NewStringCopyZ(cx, "nsISupports");
}
if (!ifaceName) {
return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
}
// a new scope to avoid warnings about shadowed names
{
nsCOMPtr<nsIXPCComponents_Interfaces> ifaces;
RootedObject ifacesObj(cx);
// we do the lookup by asking the Components.interfaces object
// for the property with this name - i.e. we let its caching of these
// nsIJSIID objects work for us.
if (NS_FAILED(comp->GetInterfaces(getter_AddRefs(ifaces))) ||
NS_FAILED(xpc->WrapNative(cx, obj, ifaces,
NS_GET_IID(nsIXPCComponents_Interfaces),
ifacesObj.address())) ||
!ifacesObj) {
return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
}
RootedId id(cx);
if (!JS_StringToId(cx, ifaceName, &id)) {
return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
}
RootedValue val(cx);
if (!JS_GetPropertyById(cx, ifacesObj, id, &val) || val.isPrimitive()) {
return ThrowAndFail(NS_ERROR_XPC_BAD_IID, cx, _retval);
}
if (!JS_DefinePropertyById(
cx, ctor, interfaceIDProp, val,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) {
return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval);
}
}
// a new scope to avoid warnings about shadowed names
{
// argv[0] is a contractid name string
// we do the lookup by asking the Components.classes object
// for the property with this name - i.e. we let its caching of these
// nsIJSCID objects work for us.
nsCOMPtr<nsIXPCComponents_Classes> classes;
RootedObject classesObj(cx);
if (NS_FAILED(comp->GetClasses(getter_AddRefs(classes))) ||
NS_FAILED(xpc->WrapNative(cx, obj, classes,
NS_GET_IID(nsIXPCComponents_Classes),
classesObj.address())) ||
!classesObj) {
return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
}
RootedString str(cx, ToString(cx, args[0]));
RootedId id(cx);
if (!str || !JS_StringToId(cx, str, &id)) {
return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
}
RootedValue val(cx);
if (!JS_GetPropertyById(cx, classesObj, id, &val) || val.isPrimitive()) {
return ThrowAndFail(NS_ERROR_XPC_BAD_CID, cx, _retval);
}
if (!JS_DefinePropertyById(
cx, ctor, classIDProp, val,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) {
return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval);
}
}
args.rval().setObject(*ctor);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Constructor::HasInstance(nsIXPConnectWrappedNative* wrapper,
JSContext* cx, JSObject* obj,
HandleValue val, bool* isa,
bool* _retval) {
*isa =
val.isObject() && JS_IsNativeFunction(&val.toObject(), InnerConstructor);
return NS_OK;
}
class nsXPCComponents_Utils final : public nsIXPCComponents_Utils,
public nsIXPCScriptable {
public:
// all the interface method declarations...
NS_DECL_ISUPPORTS
NS_DECL_NSIXPCSCRIPTABLE
NS_DECL_NSIXPCCOMPONENTS_UTILS
public:
nsXPCComponents_Utils() = default;
private:
virtual ~nsXPCComponents_Utils() = default;
nsCOMPtr<nsIXPCComponents_utils_Sandbox> mSandbox;
};
NS_IMPL_ISUPPORTS(nsXPCComponents_Utils, nsIXPCComponents_Utils,
nsIXPCScriptable)
// The nsIXPCScriptable map declaration that will generate stubs for us...
#define XPC_MAP_CLASSNAME nsXPCComponents_Utils
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_Utils"
#define XPC_MAP_FLAGS XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
nsXPCComponents_Utils::GetSandbox(nsIXPCComponents_utils_Sandbox** aSandbox) {
NS_ENSURE_ARG_POINTER(aSandbox);
if (!mSandbox) {
mSandbox = NewSandboxConstructor();
}
nsCOMPtr<nsIXPCComponents_utils_Sandbox> rval = mSandbox;
rval.forget(aSandbox);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::PrintStderr(const nsACString& message) {
printf_stderr("%s", PromiseFlatUTF8String(message).get());
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ReportError(HandleValue error, HandleValue stack,
JSContext* cx) {
// This function shall never fail! Silently eat any failure conditions.
nsCOMPtr<nsIConsoleService> console(
do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (!console) {
return NS_OK;
}
nsGlobalWindowInner* win = CurrentWindowOrNull(cx);
const uint64_t innerWindowID = win ? win->WindowID() : 0;
Rooted<Maybe<Value>> exception(cx, Some(error));
if (!innerWindowID) {
// Leak mitigation: nsConsoleService::ClearMessagesForWindowID needs
// a WindowID for cleanup and exception values could hold arbitrary
// objects alive.
exception = Nothing();
}
nsCOMPtr<nsIScriptError> scripterr;
RootedObject errorObj(cx, error.isObject() ? &error.toObject() : nullptr);
if (errorObj) {
JS::RootedObject stackVal(cx);
JS::RootedObject stackGlobal(cx);
FindExceptionStackForConsoleReport(win, error, nullptr, &stackVal,
&stackGlobal);
if (stackVal) {
scripterr = CreateScriptError(win, exception, stackVal, stackGlobal);
}
}
nsCString fileName;
uint32_t lineNo = 0;
if (!scripterr) {
RootedObject stackObj(cx);
RootedObject stackGlobal(cx);
if (stack.isObject()) {
if (!JS::IsMaybeWrappedSavedFrame(&stack.toObject())) {
return NS_ERROR_INVALID_ARG;
}
// |stack| might be a wrapper, but it must be same-compartment with
// the current global.
stackObj = &stack.toObject();
stackGlobal = JS::CurrentGlobalOrNull(cx);
js::AssertSameCompartment(stackObj, stackGlobal);
JSPrincipals* principals =
JS::GetRealmPrincipals(js::GetContextRealm(cx));
if (GetSavedFrameLine(cx, principals, stackObj, &lineNo) !=
SavedFrameResult::Ok) {
JS_ClearPendingException(cx);
}
RootedString source(cx);
nsAutoJSCString str;
if (GetSavedFrameSource(cx, principals, stackObj, &source) ==
SavedFrameResult::Ok &&
str.init(cx, source)) {
fileName = str;
} else {
JS_ClearPendingException(cx);
}
} else {
nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack();
if (frame) {
frame->GetFilename(cx, fileName);
lineNo = frame->GetLineNumber(cx);
JS::Rooted<JS::Value> stack(cx);
nsresult rv = frame->GetNativeSavedFrame(&stack);
if (NS_SUCCEEDED(rv) && stack.isObject()) {
stackObj = &stack.toObject();
MOZ_ASSERT(JS::IsUnwrappedSavedFrame(stackObj));
stackGlobal = JS::GetNonCCWObjectGlobal(stackObj);
}
}
}
if (stackObj) {
scripterr = CreateScriptError(win, exception, stackObj, stackGlobal);
}
}
if (!scripterr) {
scripterr = CreateScriptError(win, exception, nullptr, nullptr);
}
JSErrorReport* err = errorObj ? JS_ErrorFromException(cx, errorObj) : nullptr;
if (err) {
// It's a proper JS Error
uint32_t flags = err->isWarning() ? nsIScriptError::warningFlag
: nsIScriptError::errorFlag;
nsresult rv = scripterr->InitWithWindowID(
err->message() ? NS_ConvertUTF8toUTF16(err->message().c_str())
: EmptyString(),
nsDependentCString(err->filename ? err->filename.c_str() : ""),
err->lineno, err->column.oneOriginValue(), flags,
"XPConnect JavaScript", innerWindowID, innerWindowID == 0);
NS_ENSURE_SUCCESS(rv, NS_OK);
console->LogMessage(scripterr);
return NS_OK;
}
// It's not a JS Error object, so we synthesize as best we're able.
RootedString msgstr(cx, ToString(cx, error));
if (!msgstr) {
return NS_OK;
}
nsAutoJSString msg;
if (!msg.init(cx, msgstr)) {
return NS_OK;
}
nsresult rv = scripterr->InitWithWindowID(msg, fileName, lineNo, 0, 0,
"XPConnect JavaScript",
innerWindowID, innerWindowID == 0);
NS_ENSURE_SUCCESS(rv, NS_OK);
console->LogMessage(scripterr);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::EvalInSandbox(
const nsAString& source, HandleValue sandboxVal, HandleValue version,
const nsACString& filenameArg, int32_t lineNumber,
bool enforceFilenameRestrictions, JSContext* cx, uint8_t optionalArgc,
MutableHandleValue retval) {
RootedObject sandbox(cx);
if (!JS_ValueToObject(cx, sandboxVal, &sandbox) || !sandbox) {
return NS_ERROR_INVALID_ARG;
}
// Optional third argument: JS version, as a string, is unused.
// Optional fourth and fifth arguments: filename and line number.
int32_t lineNo = (optionalArgc >= 3) ? lineNumber : 1;
nsCString filename;
if (!filenameArg.IsVoid()) {
filename.Assign(filenameArg);
} else {
// Get the current source info.
if (nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack()) {
frame->GetFilename(cx, filename);
lineNo = frame->GetLineNumber(cx);
}
}
enforceFilenameRestrictions =
(optionalArgc >= 4) ? enforceFilenameRestrictions : true;
return xpc::EvalInSandbox(cx, sandbox, source, filename, lineNo,
enforceFilenameRestrictions, retval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetUAWidgetScope(nsIPrincipal* principal, JSContext* cx,
MutableHandleValue rval) {
rval.set(UndefinedValue());
JSObject* scope = xpc::GetUAWidgetScope(cx, principal);
rval.set(JS::ObjectValue(*scope));
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetSandboxMetadata(HandleValue sandboxVal, JSContext* cx,
MutableHandleValue rval) {
if (!sandboxVal.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject sandbox(cx, &sandboxVal.toObject());
// We only care about sandboxes here, so CheckedUnwrapStatic is fine.
sandbox = js::CheckedUnwrapStatic(sandbox);
if (!sandbox || !xpc::IsSandbox(sandbox)) {
return NS_ERROR_INVALID_ARG;
}
return xpc::GetSandboxMetadata(cx, sandbox, rval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::SetSandboxMetadata(HandleValue sandboxVal,
HandleValue metadataVal,
JSContext* cx) {
if (!sandboxVal.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject sandbox(cx, &sandboxVal.toObject());
// We only care about sandboxes here, so CheckedUnwrapStatic is fine.
sandbox = js::CheckedUnwrapStatic(sandbox);
if (!sandbox || !xpc::IsSandbox(sandbox)) {
return NS_ERROR_INVALID_ARG;
}
nsresult rv = xpc::SetSandboxMetadata(cx, sandbox, metadataVal);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::Import(const nsACString& registryLocation,
HandleValue targetObj, JSContext* cx,
uint8_t optionalArgc, MutableHandleValue retval) {
RefPtr moduleloader = mozJSModuleLoader::Get();
MOZ_ASSERT(moduleloader);
AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING("nsXPCComponents_Utils::Import", OTHER,
registryLocation);
return moduleloader->ImportInto(registryLocation, targetObj, cx, optionalArgc,
retval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsModuleLoaded(const nsACString& aResourceURI,
bool* retval) {
RefPtr moduleloader = mozJSModuleLoader::Get();
MOZ_ASSERT(moduleloader);
return moduleloader->IsModuleLoaded(aResourceURI, retval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsJSModuleLoaded(const nsACString& aResourceURI,
bool* retval) {
RefPtr moduleloader = mozJSModuleLoader::Get();
MOZ_ASSERT(moduleloader);
return moduleloader->IsJSModuleLoaded(aResourceURI, retval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsESModuleLoaded(const nsACString& aResourceURI,
bool* retval) {
RefPtr moduleloader = mozJSModuleLoader::Get();
MOZ_ASSERT(moduleloader);
return moduleloader->IsESModuleLoaded(aResourceURI, retval);
}
NS_IMETHODIMP
nsXPCComponents_Utils::Unload(const nsACString& registryLocation) {
RefPtr moduleloader = mozJSModuleLoader::Get();
MOZ_ASSERT(moduleloader);
return moduleloader->Unload(registryLocation);
}
NS_IMETHODIMP
nsXPCComponents_Utils::ImportGlobalProperties(HandleValue aPropertyList,
JSContext* cx) {
// Ensure we're working in the scripted caller's realm. This is not guaranteed
// to be the current realm because we switch realms when calling cross-realm
// functions.
RootedObject global(cx, JS::GetScriptedCallerGlobal(cx));
MOZ_ASSERT(global);
js::AssertSameCompartment(cx, global);
JSAutoRealm ar(cx, global);
// Don't allow doing this if the global is a Window.
nsGlobalWindowInner* win;
if (NS_SUCCEEDED(UNWRAP_NON_WRAPPER_OBJECT(Window, global, win))) {
return NS_ERROR_NOT_AVAILABLE;
}
GlobalProperties options;
NS_ENSURE_TRUE(aPropertyList.isObject(), NS_ERROR_INVALID_ARG);
RootedObject propertyList(cx, &aPropertyList.toObject());
bool isArray;
if (NS_WARN_IF(!JS::IsArrayObject(cx, propertyList, &isArray))) {
return NS_ERROR_FAILURE;
}
if (NS_WARN_IF(!isArray)) {
return NS_ERROR_INVALID_ARG;
}
if (!options.Parse(cx, propertyList) ||
!options.DefineInXPCComponents(cx, global)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetWeakReference(HandleValue object, JSContext* cx,
xpcIJSWeakReference** _retval) {
RefPtr<xpcJSWeakReference> ref = new xpcJSWeakReference();
nsresult rv = ref->Init(cx, object);
NS_ENSURE_SUCCESS(rv, rv);
ref.forget(_retval);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ForceGC(JSContext* aCx) {
PrepareForFullGC(aCx);
NonIncrementalGC(aCx, GCOptions::Normal, GCReason::COMPONENT_UTILS);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ForceCC(nsICycleCollectorListener* listener) {
nsJSContext::CycleCollectNow(CCReason::API, listener);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateCCLogger(nsICycleCollectorListener** aListener) {
NS_ENSURE_ARG_POINTER(aListener);
nsCOMPtr<nsICycleCollectorListener> logger = nsCycleCollector_createLogger();
logger.forget(aListener);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::FinishCC() {
nsCycleCollector_finishAnyCurrentCollection();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CcSlice(int64_t budget) {
nsJSContext::RunCycleCollectorWorkSlice(budget);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetMaxCCSliceTimeSinceClear(int32_t* out) {
*out = nsJSContext::GetMaxCCSliceTimeSinceClear();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ClearMaxCCTime() {
nsJSContext::ClearMaxCCSliceTime();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ForceShrinkingGC(JSContext* aCx) {
PrepareForFullGC(aCx);
NonIncrementalGC(aCx, GCOptions::Shrink, GCReason::COMPONENT_UTILS);
return NS_OK;
}
class PreciseGCRunnable : public Runnable {
public:
PreciseGCRunnable(nsIScheduledGCCallback* aCallback, bool aShrinking)
: mozilla::Runnable("PreciseGCRunnable"),
mCallback(aCallback),
mShrinking(aShrinking) {}
NS_IMETHOD Run() override {
nsJSContext::GarbageCollectNow(
GCReason::COMPONENT_UTILS,
mShrinking ? nsJSContext::ShrinkingGC : nsJSContext::NonShrinkingGC);
mCallback->Callback();
return NS_OK;
}
private:
nsCOMPtr<nsIScheduledGCCallback> mCallback;
bool mShrinking;
};
NS_IMETHODIMP
nsXPCComponents_Utils::SchedulePreciseGC(nsIScheduledGCCallback* aCallback) {
RefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, false);
return NS_DispatchToMainThread(event);
}
NS_IMETHODIMP
nsXPCComponents_Utils::SchedulePreciseShrinkingGC(
nsIScheduledGCCallback* aCallback) {
RefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, true);
return NS_DispatchToMainThread(event);
}
NS_IMETHODIMP
nsXPCComponents_Utils::UnlinkGhostWindows() {
#ifdef DEBUG
nsWindowMemoryReporter::UnlinkGhostWindows();
if (XRE_IsParentProcess()) {
nsCOMPtr<nsIObserverService> obsvc = services::GetObserverService();
if (obsvc) {
obsvc->NotifyObservers(nullptr, "child-ghost-request", nullptr);
}
}
return NS_OK;
#else
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
#ifdef NS_FREE_PERMANENT_DATA
struct IntentionallyLeakedObject {
MOZ_COUNTED_DEFAULT_CTOR(IntentionallyLeakedObject)
MOZ_COUNTED_DTOR(IntentionallyLeakedObject)
};
#endif
NS_IMETHODIMP
nsXPCComponents_Utils::IntentionallyLeak() {
#ifdef NS_FREE_PERMANENT_DATA
Unused << new IntentionallyLeakedObject();
return NS_OK;
#else
return NS_ERROR_NOT_IMPLEMENTED;
#endif
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetJSTestingFunctions(JSContext* cx,
MutableHandleValue retval) {
JSObject* obj = js::GetTestingFunctions(cx);
if (!obj) {
return NS_ERROR_XPC_JAVASCRIPT_ERROR;
}
retval.setObject(*obj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetFunctionSourceLocation(HandleValue funcValue,
JSContext* cx,
MutableHandleValue retval) {
NS_ENSURE_TRUE(funcValue.isObject(), NS_ERROR_INVALID_ARG);
nsAutoString filename;
uint32_t lineNumber;
{
RootedObject funcObj(cx, UncheckedUnwrap(&funcValue.toObject()));
JSAutoRealm ar(cx, funcObj);
Rooted<JSFunction*> func(cx, JS_GetObjectFunction(funcObj));
NS_ENSURE_TRUE(func, NS_ERROR_INVALID_ARG);
RootedScript script(cx, JS_GetFunctionScript(cx, func));
NS_ENSURE_TRUE(script, NS_ERROR_FAILURE);
AppendUTF8toUTF16(nsDependentCString(JS_GetScriptFilename(script)),
filename);
lineNumber = JS_GetScriptBaseLineNumber(cx, script) + 1;
}
RootedObject res(cx, JS_NewPlainObject(cx));
NS_ENSURE_TRUE(res, NS_ERROR_OUT_OF_MEMORY);
RootedValue filenameVal(cx);
if (!xpc::NonVoidStringToJsval(cx, filename, &filenameVal) ||
!JS_DefineProperty(cx, res, "filename", filenameVal, JSPROP_ENUMERATE)) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (!JS_DefineProperty(cx, res, "lineNumber", lineNumber, JSPROP_ENUMERATE)) {
return NS_ERROR_OUT_OF_MEMORY;
}
retval.setObject(*res);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CallFunctionWithAsyncStack(HandleValue function,
nsIStackFrame* stack,
const nsAString& asyncCause,
JSContext* cx,
MutableHandleValue retval) {
nsresult rv;
if (!stack || asyncCause.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
JS::Rooted<JS::Value> asyncStack(cx);
rv = stack->GetNativeSavedFrame(&asyncStack);
if (NS_FAILED(rv)) {
return rv;
}
if (!asyncStack.isObject()) {
JS_ReportErrorASCII(cx, "Must use a native JavaScript stack frame");
return NS_ERROR_INVALID_ARG;
}
JS::Rooted<JSObject*> asyncStackObj(cx, &asyncStack.toObject());
NS_ConvertUTF16toUTF8 utf8Cause(asyncCause);
JS::AutoSetAsyncStackForNewCalls sas(
cx, asyncStackObj, utf8Cause.get(),
JS::AutoSetAsyncStackForNewCalls::AsyncCallKind::EXPLICIT);
if (!JS_CallFunctionValue(cx, nullptr, function,
JS::HandleValueArray::empty(), retval)) {
return NS_ERROR_XPC_JAVASCRIPT_ERROR;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetGlobalForObject(HandleValue object, JSContext* cx,
MutableHandleValue retval) {
// First argument must be an object.
if (object.isPrimitive()) {
return NS_ERROR_XPC_BAD_CONVERT_JS;
}
// When getting the global for a cross-compartment wrapper, we really want
// a wrapper for the foreign global. So we need to unwrap before getting the
// global and then wrap the result.
Rooted<JSObject*> obj(cx, &object.toObject());
obj = JS::GetNonCCWObjectGlobal(js::UncheckedUnwrap(obj));
if (!JS_WrapObject(cx, &obj)) {
return NS_ERROR_FAILURE;
}
// Get the WindowProxy if necessary.
obj = js::ToWindowProxyIfWindow(obj);
retval.setObject(*obj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsProxy(HandleValue vobj, JSContext* cx, bool* rval) {
if (!vobj.isObject()) {
*rval = false;
return NS_OK;
}
RootedObject obj(cx, &vobj.toObject());
// We need to do a dynamic unwrap, because we apparently want to treat
// "failure to unwrap" differently from "not a proxy" (throw for the former,
// return false for the latter).
obj = js::CheckedUnwrapDynamic(obj, cx, /* stopAtWindowProxy = */ false);
NS_ENSURE_TRUE(obj, NS_ERROR_FAILURE);
*rval = js::IsScriptedProxy(obj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ExportFunction(HandleValue vfunction, HandleValue vscope,
HandleValue voptions, JSContext* cx,
MutableHandleValue rval) {
if (!xpc::ExportFunction(cx, vfunction, vscope, voptions, rval)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateObjectIn(HandleValue vobj, HandleValue voptions,
JSContext* cx, MutableHandleValue rval) {
RootedObject optionsObject(
cx, voptions.isObject() ? &voptions.toObject() : nullptr);
CreateObjectInOptions options(cx, optionsObject);
if (voptions.isObject() && !options.Parse()) {
return NS_ERROR_FAILURE;
}
if (!xpc::CreateObjectIn(cx, vobj, options, rval)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::MakeObjectPropsNormal(HandleValue vobj, JSContext* cx) {
if (!cx) {
return NS_ERROR_FAILURE;
}
// first argument must be an object
if (vobj.isPrimitive()) {
return NS_ERROR_XPC_BAD_CONVERT_JS;
}
RootedObject obj(cx, js::UncheckedUnwrap(&vobj.toObject()));
JSAutoRealm ar(cx, obj);
Rooted<IdVector> ida(cx, IdVector(cx));
if (!JS_Enumerate(cx, obj, &ida)) {
return NS_ERROR_FAILURE;
}
RootedId id(cx);
RootedValue v(cx);
for (size_t i = 0; i < ida.length(); ++i) {
id = ida[i];
if (!JS_GetPropertyById(cx, obj, id, &v)) {
return NS_ERROR_FAILURE;
}
if (v.isPrimitive()) {
continue;
}
RootedObject propobj(cx, &v.toObject());
// TODO Deal with non-functions.
if (!js::IsWrapper(propobj) || !JS::IsCallable(propobj)) {
continue;
}
FunctionForwarderOptions forwarderOptions;
if (!NewFunctionForwarder(cx, id, propobj, forwarderOptions, &v) ||
!JS_SetPropertyById(cx, obj, id, v))
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsDeadWrapper(HandleValue obj, bool* out) {
*out = false;
if (obj.isPrimitive()) {
return NS_ERROR_INVALID_ARG;
}
// We should never have cross-compartment wrappers for dead wrappers.
MOZ_ASSERT_IF(js::IsCrossCompartmentWrapper(&obj.toObject()),
!JS_IsDeadWrapper(js::UncheckedUnwrap(&obj.toObject())));
*out = JS_IsDeadWrapper(&obj.toObject());
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsRemoteProxy(HandleValue val, bool* out) {
if (val.isObject()) {
*out = dom::IsRemoteObjectProxy(UncheckedUnwrap(&val.toObject()));
;
} else {
*out = false;
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::RecomputeWrappers(HandleValue vobj, JSContext* cx) {
// Determine the compartment of the given object, if any.
JS::Compartment* c =
vobj.isObject()
? JS::GetCompartment(js::UncheckedUnwrap(&vobj.toObject()))
: nullptr;
// If no compartment was given, recompute all.
if (!c) {
js::RecomputeWrappers(cx, js::AllCompartments(), js::AllCompartments());
// Otherwise, recompute wrappers for the given compartment.
} else {
js::RecomputeWrappers(cx, js::SingleCompartment(c),
js::AllCompartments()) &&
js::RecomputeWrappers(cx, js::AllCompartments(),
js::SingleCompartment(c));
}
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::SetWantXrays(HandleValue vscope, JSContext* cx) {
if (!vscope.isObject()) {
return NS_ERROR_INVALID_ARG;
}
JSObject* scopeObj = js::UncheckedUnwrap(&vscope.toObject());
MOZ_RELEASE_ASSERT(!AccessCheck::isChrome(scopeObj),
"Don't call setWantXrays on system-principal scopes");
JS::Compartment* compartment = JS::GetCompartment(scopeObj);
CompartmentPrivate::Get(scopeObj)->wantXrays = true;
bool ok = js::RecomputeWrappers(cx, js::SingleCompartment(compartment),
js::AllCompartments());
NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::Dispatch(HandleValue runnableArg, HandleValue scope,
JSContext* cx) {
RootedValue runnable(cx, runnableArg);
// Enter the given realm, if any, and rewrap runnable.
Maybe<JSAutoRealm> ar;
if (scope.isObject()) {
JSObject* scopeObj = js::UncheckedUnwrap(&scope.toObject());
if (!scopeObj) {
return NS_ERROR_FAILURE;
}
ar.emplace(cx, scopeObj);
if (!JS_WrapValue(cx, &runnable)) {
return NS_ERROR_FAILURE;
}
}
// Get an XPCWrappedJS for |runnable|.
if (!runnable.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject runnableObj(cx, &runnable.toObject());
nsCOMPtr<nsIRunnable> run;
nsresult rv = nsXPConnect::XPConnect()->WrapJS(
cx, runnableObj, NS_GET_IID(nsIRunnable), getter_AddRefs(run));
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(run);
// Dispatch.
return NS_DispatchToMainThread(run);
}
NS_IMETHODIMP
nsXPCComponents_Utils::SetGCZeal(int32_t aValue, JSContext* cx) {
#ifdef JS_GC_ZEAL
JS::SetGCZeal(cx, uint8_t(aValue), JS::BrowserDefaultGCZealFrequency);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetIsInAutomation(bool* aResult) {
NS_ENSURE_ARG_POINTER(aResult);
*aResult = xpc::IsInAutomation();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ExitIfInAutomation() {
NS_ENSURE_TRUE(xpc::IsInAutomation(), NS_ERROR_FAILURE);
profiler_shutdown(IsFastShutdown::Yes);
mozilla::AppShutdown::DoImmediateExit();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CrashIfNotInAutomation() {
xpc::CrashIfNotInAutomation();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::NukeSandbox(HandleValue obj, JSContext* cx) {
AUTO_PROFILER_LABEL("nsXPCComponents_Utils::NukeSandbox", OTHER);
NS_ENSURE_TRUE(obj.isObject(), NS_ERROR_INVALID_ARG);
JSObject* wrapper = &obj.toObject();
NS_ENSURE_TRUE(IsWrapper(wrapper), NS_ERROR_INVALID_ARG);
RootedObject sb(cx, UncheckedUnwrap(wrapper));
NS_ENSURE_TRUE(IsSandbox(sb), NS_ERROR_INVALID_ARG);
xpc::NukeAllWrappersForRealm(cx, GetNonCCWObjectRealm(sb));
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::BlockScriptForGlobal(HandleValue globalArg,
JSContext* cx) {
NS_ENSURE_TRUE(globalArg.isObject(), NS_ERROR_INVALID_ARG);
RootedObject global(cx, UncheckedUnwrap(&globalArg.toObject(),
/* stopAtWindowProxy = */ false));
NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG);
if (xpc::GetObjectPrincipal(global)->IsSystemPrincipal()) {
JS_ReportErrorASCII(cx, "Script may not be disabled for system globals");
return NS_ERROR_FAILURE;
}
Scriptability::Get(global).Block();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::UnblockScriptForGlobal(HandleValue globalArg,
JSContext* cx) {
NS_ENSURE_TRUE(globalArg.isObject(), NS_ERROR_INVALID_ARG);
RootedObject global(cx, UncheckedUnwrap(&globalArg.toObject(),
/* stopAtWindowProxy = */ false));
NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG);
if (xpc::GetObjectPrincipal(global)->IsSystemPrincipal()) {
JS_ReportErrorASCII(cx, "Script may not be disabled for system globals");
return NS_ERROR_FAILURE;
}
Scriptability::Get(global).Unblock();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsOpaqueWrapper(HandleValue obj, bool* aRetval) {
*aRetval =
obj.isObject() && xpc::WrapperFactory::IsOpaqueWrapper(&obj.toObject());
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::IsXrayWrapper(HandleValue obj, bool* aRetval) {
*aRetval =
obj.isObject() && xpc::WrapperFactory::IsXrayWrapper(&obj.toObject());
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::WaiveXrays(HandleValue aVal, JSContext* aCx,
MutableHandleValue aRetval) {
RootedValue value(aCx, aVal);
if (!xpc::WrapperFactory::WaiveXrayAndWrap(aCx, &value)) {
return NS_ERROR_FAILURE;
}
aRetval.set(value);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::UnwaiveXrays(HandleValue aVal, JSContext* aCx,
MutableHandleValue aRetval) {
if (!aVal.isObject()) {
aRetval.set(aVal);
return NS_OK;
}
RootedObject obj(aCx, js::UncheckedUnwrap(&aVal.toObject()));
if (!JS_WrapObject(aCx, &obj)) {
return NS_ERROR_FAILURE;
}
aRetval.setObject(*obj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetClassName(HandleValue aObj, bool aUnwrap,
JSContext* aCx, char** aRv) {
if (!aObj.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject obj(aCx, &aObj.toObject());
if (aUnwrap) {
obj = js::UncheckedUnwrap(obj, /* stopAtWindowProxy = */ false);
}
*aRv = NS_xstrdup(JS::GetClass(obj)->name);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetIncumbentGlobal(HandleValue aCallback, JSContext* aCx,
MutableHandleValue aOut) {
nsCOMPtr<nsIGlobalObject> global = mozilla::dom::GetIncumbentGlobal();
RootedValue globalVal(aCx);
if (!global) {
globalVal = NullValue();
} else {
// Note: We rely on the wrap call for outerization.
globalVal = ObjectValue(*global->GetGlobalJSObject());
if (!JS_WrapValue(aCx, &globalVal)) {
return NS_ERROR_FAILURE;
}
}
// Invoke the callback, if passed.
if (aCallback.isObject()) {
RootedValue ignored(aCx);
if (!JS_CallFunctionValue(aCx, nullptr, aCallback,
JS::HandleValueArray(globalVal), &ignored)) {
return NS_ERROR_FAILURE;
}
}
aOut.set(globalVal);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetDebugName(HandleValue aObj, JSContext* aCx,
nsACString& aOut) {
if (!aObj.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject obj(aCx, &aObj.toObject());
aOut = xpc::GetFunctionName(aCx, obj);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetWatchdogTimestamp(const nsAString& aCategory,
PRTime* aOut) {
WatchdogTimestampCategory category;
if (aCategory.EqualsLiteral("ContextStateChange")) {
category = TimestampContextStateChange;
} else if (aCategory.EqualsLiteral("WatchdogWakeup")) {
category = TimestampWatchdogWakeup;
} else if (aCategory.EqualsLiteral("WatchdogHibernateStart")) {
category = TimestampWatchdogHibernateStart;
} else if (aCategory.EqualsLiteral("WatchdogHibernateStop")) {
category = TimestampWatchdogHibernateStop;
} else {
return NS_ERROR_INVALID_ARG;
}
*aOut = XPCJSContext::Get()->GetWatchdogTimestamp(category);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetJSEngineTelemetryValue(JSContext* cx,
MutableHandleValue rval) {
RootedObject obj(cx, JS_NewPlainObject(cx));
if (!obj) {
return NS_ERROR_OUT_OF_MEMORY;
}
// No JS engine telemetry in use at the moment.
rval.setObject(*obj);
return NS_OK;
}
bool xpc::CloneInto(JSContext* aCx, HandleValue aValue, HandleValue aScope,
HandleValue aOptions, MutableHandleValue aCloned) {
if (!aScope.isObject()) {
return false;
}
RootedObject scope(aCx, &aScope.toObject());
// The scope could be a Window, so we need to CheckedUnwrapDynamic.
scope = js::CheckedUnwrapDynamic(scope, aCx);
if (!scope) {
JS_ReportErrorASCII(aCx, "Permission denied to clone object into scope");
return false;
}
if (!aOptions.isUndefined() && !aOptions.isObject()) {
JS_ReportErrorASCII(aCx, "Invalid argument");
return false;
}
RootedObject optionsObject(
aCx, aOptions.isObject() ? &aOptions.toObject() : nullptr);
StackScopedCloneOptions options(aCx, optionsObject);
if (aOptions.isObject() && !options.Parse()) {
return false;
}
js::AssertSameCompartment(aCx, aValue);
RootedObject sourceScope(aCx, JS::CurrentGlobalOrNull(aCx));
{
JSAutoRealm ar(aCx, scope);
aCloned.set(aValue);
if (!StackScopedClone(aCx, options, sourceScope, aCloned)) {
return false;
}
}
return JS_WrapValue(aCx, aCloned);
}
NS_IMETHODIMP
nsXPCComponents_Utils::CloneInto(HandleValue aValue, HandleValue aScope,
HandleValue aOptions, JSContext* aCx,
MutableHandleValue aCloned) {
return xpc::CloneInto(aCx, aValue, aScope, aOptions, aCloned)
? NS_OK
: NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetWebIDLCallerPrincipal(nsIPrincipal** aResult) {
// This API may only be when the Entry Settings Object corresponds to a
// JS-implemented WebIDL call. In all other cases, the value will be null,
// and we throw.
nsCOMPtr<nsIPrincipal> callerPrin = mozilla::dom::GetWebIDLCallerPrincipal();
if (!callerPrin) {
return NS_ERROR_NOT_AVAILABLE;
}
callerPrin.forget(aResult);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetObjectPrincipal(HandleValue val, JSContext* cx,
nsIPrincipal** result) {
if (!val.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject obj(cx, &val.toObject());
// We need to be able to unwrap to WindowProxy or Location here, so
// use CheckedUnwrapDynamic.
obj = js::CheckedUnwrapDynamic(obj, cx);
MOZ_ASSERT(obj);
nsCOMPtr<nsIPrincipal> prin = nsContentUtils::ObjectPrincipal(obj);
prin.forget(result);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetRealmLocation(HandleValue val, JSContext* cx,
nsACString& result) {
if (!val.isObject()) {
return NS_ERROR_INVALID_ARG;
}
RootedObject obj(cx, &val.toObject());
// We need to be able to unwrap to WindowProxy or Location here, so
// use CheckedUnwrapDynamic.
obj = js::CheckedUnwrapDynamic(obj, cx);
MOZ_ASSERT(obj);
result = xpc::RealmPrivate::Get(obj)->GetLocation();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ReadUTF8File(nsIFile* aFile, nsACString& aResult) {
NS_ENSURE_TRUE(aFile, NS_ERROR_INVALID_ARG);
MOZ_TRY_VAR(aResult, URLPreloader::ReadFile(aFile));
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::ReadUTF8URI(nsIURI* aURI, nsACString& aResult) {
NS_ENSURE_TRUE(aURI, NS_ERROR_INVALID_ARG);
MOZ_TRY_VAR(aResult, URLPreloader::ReadURI(aURI));
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::Now(double* aRetval) {
TimeStamp start = TimeStamp::ProcessCreation();
*aRetval = (TimeStamp::Now() - start).ToMilliseconds();
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateSpellChecker(nsIEditorSpellCheck** aSpellChecker) {
NS_ENSURE_ARG_POINTER(aSpellChecker);
nsCOMPtr<nsIEditorSpellCheck> spellChecker = new mozilla::EditorSpellCheck();
spellChecker.forget(aSpellChecker);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateCommandLine(const nsTArray<nsCString>& aArgs,
nsIFile* aWorkingDir, uint32_t aState,
nsISupports** aCommandLine) {
NS_ENSURE_ARG_MAX(aState, nsICommandLine::STATE_REMOTE_EXPLICIT);
NS_ENSURE_ARG_POINTER(aCommandLine);
nsCOMPtr<nsISupports> commandLine = new nsCommandLine();
nsCOMPtr<nsICommandLineRunner> runner = do_QueryInterface(commandLine);
nsTArray<const char*> fakeArgv(aArgs.Length() + 2);
// Prepend a dummy argument for the program name, which will be ignored.
fakeArgv.AppendElement(nullptr);
for (const nsCString& arg : aArgs) {
fakeArgv.AppendElement(arg.get());
}
// Append a null terminator.
fakeArgv.AppendElement(nullptr);
nsresult rv = runner->Init(fakeArgv.Length() - 1, fakeArgv.Elements(),
aWorkingDir, aState);
NS_ENSURE_SUCCESS(rv, rv);
commandLine.forget(aCommandLine);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateCommandParams(nsICommandParams** aCommandParams) {
NS_ENSURE_ARG_POINTER(aCommandParams);
nsCOMPtr<nsICommandParams> commandParams = new nsCommandParams();
commandParams.forget(aCommandParams);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateLoadContext(nsILoadContext** aLoadContext) {
NS_ENSURE_ARG_POINTER(aLoadContext);
nsCOMPtr<nsILoadContext> loadContext = ::CreateLoadContext();
loadContext.forget(aLoadContext);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreatePrivateLoadContext(nsILoadContext** aLoadContext) {
NS_ENSURE_ARG_POINTER(aLoadContext);
nsCOMPtr<nsILoadContext> loadContext = ::CreatePrivateLoadContext();
loadContext.forget(aLoadContext);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreatePersistentProperties(
nsIPersistentProperties** aPersistentProperties) {
NS_ENSURE_ARG_POINTER(aPersistentProperties);
nsCOMPtr<nsIPersistentProperties> props = new nsPersistentProperties();
props.forget(aPersistentProperties);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateDocumentEncoder(
const char* aContentType, nsIDocumentEncoder** aDocumentEncoder) {
NS_ENSURE_ARG_POINTER(aDocumentEncoder);
nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder(aContentType);
encoder.forget(aDocumentEncoder);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::CreateHTMLCopyEncoder(
nsIDocumentEncoder** aDocumentEncoder) {
NS_ENSURE_ARG_POINTER(aDocumentEncoder);
nsCOMPtr<nsIDocumentEncoder> encoder = do_createHTMLCopyEncoder();
encoder.forget(aDocumentEncoder);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetLoadedModules(nsTArray<nsCString>& aLoadedModules) {
return mozJSModuleLoader::Get()->GetLoadedJSAndESModules(aLoadedModules);
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetLoadedJSModules(
nsTArray<nsCString>& aLoadedJSModules) {
mozJSModuleLoader::Get()->GetLoadedModules(aLoadedJSModules);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetLoadedESModules(
nsTArray<nsCString>& aLoadedESModules) {
return mozJSModuleLoader::Get()->GetLoadedESModules(aLoadedESModules);
}
NS_IMETHODIMP
nsXPCComponents_Utils::GetModuleImportStack(const nsACString& aLocation,
nsACString& aRetval) {
nsresult rv =
mozJSModuleLoader::Get()->GetModuleImportStack(aLocation, aRetval);
// Fallback the query to the DevTools loader if not found in the shared loader
if (rv == NS_ERROR_FAILURE && mozJSModuleLoader::GetDevToolsLoader()) {
return mozJSModuleLoader::GetDevToolsLoader()->GetModuleImportStack(
aLocation, aRetval);
}
return rv;
}
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
nsXPCComponents::nsXPCComponents(XPCWrappedNativeScope* aScope)
: mScope(aScope) {
MOZ_ASSERT(aScope, "aScope must not be null");
}
nsXPCComponents::~nsXPCComponents() = default;
void nsXPCComponents::ClearMembers() {
mInterfaces = nullptr;
mResults = nullptr;
mClasses = nullptr;
mID = nullptr;
mException = nullptr;
mConstructor = nullptr;
mUtils = nullptr;
}
/*******************************************/
#define XPC_IMPL_GET_OBJ_METHOD(_class, _n) \
NS_IMETHODIMP _class::Get##_n(nsIXPCComponents_##_n** a##_n) { \
NS_ENSURE_ARG_POINTER(a##_n); \
if (!m##_n) m##_n = new nsXPCComponents_##_n(); \
RefPtr<nsXPCComponents_##_n> ret = m##_n; \
ret.forget(a##_n); \
return NS_OK; \
}
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Interfaces)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Classes)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Results)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, ID)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Exception)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Constructor)
XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Utils)
#undef XPC_IMPL_GET_OBJ_METHOD
/*******************************************/
NS_IMETHODIMP
nsXPCComponents::IsSuccessCode(nsresult result, bool* out) {
*out = NS_SUCCEEDED(result);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents::GetStack(nsIStackFrame** aStack) {
nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack();
frame.forget(aStack);
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents::GetManager(nsIComponentManager** aManager) {
MOZ_ASSERT(aManager, "bad param");
return NS_GetComponentManager(aManager);
}
NS_IMETHODIMP
nsXPCComponents::GetReturnCode(JSContext* aCx, MutableHandleValue aOut) {
nsresult res = XPCJSContext::Get()->GetPendingResult();
aOut.setNumber(static_cast<uint32_t>(res));
return NS_OK;
}
NS_IMETHODIMP
nsXPCComponents::SetReturnCode(JSContext* aCx, HandleValue aCode) {
nsresult rv;
if (!ToUint32(aCx, aCode, (uint32_t*)&rv)) {
return NS_ERROR_FAILURE;
}
XPCJSContext::Get()->SetPendingResult(rv);
return NS_OK;
}
/**********************************************/
class ComponentsSH : public nsIXPCScriptable {
public:
explicit constexpr ComponentsSH(unsigned dummy) {}
// We don't actually inherit any ref counting infrastructure, but we don't
// need an nsAutoRefCnt member, so the _INHERITED macro is a hack to avoid
// having one.
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIXPCSCRIPTABLE
static nsresult Get(nsIXPCScriptable** helper) {
*helper = &singleton;
return NS_OK;
}
private:
static ComponentsSH singleton;
};
ComponentsSH ComponentsSH::singleton(0);
// Singleton refcounting.
NS_IMETHODIMP_(MozExternalRefCountType) ComponentsSH::AddRef(void) { return 1; }
NS_IMETHODIMP_(MozExternalRefCountType) ComponentsSH::Release(void) {
return 1;
}
NS_IMPL_QUERY_INTERFACE(ComponentsSH, nsIXPCScriptable)
#define NSXPCCOMPONENTS_CID \
{ \
0x3649f405, 0xf0ec, 0x4c28, { \
0xae, 0xb0, 0xaf, 0x9a, 0x51, 0xe4, 0x4c, 0x81 \
} \
}
NS_IMPL_CLASSINFO(nsXPCComponents, &ComponentsSH::Get, 0, NSXPCCOMPONENTS_CID)
NS_IMPL_ISUPPORTS_CI(nsXPCComponents, nsIXPCComponents)
// The nsIXPCScriptable map declaration that will generate stubs for us
#define XPC_MAP_CLASSNAME ComponentsSH
#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents"
#define XPC_MAP_FLAGS XPC_SCRIPTABLE_WANT_PRECREATE
#include "xpc_map_end.h" /* This will #undef the above */
NS_IMETHODIMP
ComponentsSH::PreCreate(nsISupports* nativeObj, JSContext* cx,
JSObject* globalObj, JSObject** parentObj) {
nsXPCComponents* self = static_cast<nsXPCComponents*>(nativeObj);
// this should never happen
if (!self->GetScope()) {
NS_WARNING(
"mScope must not be null when nsXPCComponents::PreCreate is called");
return NS_ERROR_FAILURE;
}
*parentObj = self->GetScope()->GetGlobalForWrappedNatives();
return NS_OK;
}