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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/. */
#include "UntrustedModules.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/MozPromise.h"
#include "mozilla/RDDChild.h"
#include "mozilla/RDDProcessManager.h"
#include "mozilla/WinDllServices.h"
#include "nsISupportsImpl.h"
#include "nsProxyRelease.h"
#include "nsXULAppAPI.h"
#include "UntrustedModulesDataSerializer.h"
namespace mozilla {
namespace Telemetry {
static const uint32_t kMaxModulesArrayLen = 100;
using UntrustedModulesIpcPromise =
MozPromise<Maybe<UntrustedModulesData>, ipc::ResponseRejectReason, true>;
using MultiGetUntrustedModulesPromise =
MozPromise<bool /*aIgnored*/, nsresult, true>;
class MOZ_HEAP_CLASS MultiGetUntrustedModulesData final {
using BackupType = UntrustedModulesBackupService::BackupType;
public:
/**
* @param aFlags [in] Combinations of the flags defined under nsITelemetry.
* (See "Flags for getUntrustedModuleLoadEvents"
* in nsITelemetry.idl)
*/
explicit MultiGetUntrustedModulesData(uint32_t aFlags)
: mFlags(aFlags),
mBackupSvc(UntrustedModulesBackupService::Get()),
mPromise(new MultiGetUntrustedModulesPromise::Private(__func__)),
mNumPending(0) {}
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MultiGetUntrustedModulesData)
RefPtr<MultiGetUntrustedModulesPromise> GetUntrustedModuleLoadEvents();
void Serialize(RefPtr<dom::Promise>&& aPromise);
MultiGetUntrustedModulesData(const MultiGetUntrustedModulesData&) = delete;
MultiGetUntrustedModulesData(MultiGetUntrustedModulesData&&) = delete;
MultiGetUntrustedModulesData& operator=(const MultiGetUntrustedModulesData&) =
delete;
MultiGetUntrustedModulesData& operator=(MultiGetUntrustedModulesData&&) =
delete;
private:
~MultiGetUntrustedModulesData() = default;
void AddPending(RefPtr<UntrustedModulesPromise>&& aNewPending) {
MOZ_ASSERT(NS_IsMainThread());
++mNumPending;
RefPtr<MultiGetUntrustedModulesData> self(this);
aNewPending->Then(
GetMainThreadSerialEventTarget(), __func__,
[self](Maybe<UntrustedModulesData>&& aResult) {
self->OnCompletion(std::move(aResult));
},
[self](nsresult aReason) { self->OnCompletion(); });
}
void AddPending(RefPtr<UntrustedModulesIpcPromise>&& aNewPending) {
MOZ_ASSERT(NS_IsMainThread());
++mNumPending;
RefPtr<MultiGetUntrustedModulesData> self(this);
aNewPending->Then(
GetMainThreadSerialEventTarget(), __func__,
[self](Maybe<UntrustedModulesData>&& aResult) {
self->OnCompletion(std::move(aResult));
},
[self](ipc::ResponseRejectReason&& aReason) { self->OnCompletion(); });
}
void OnCompletion() {
MOZ_ASSERT(NS_IsMainThread() && mNumPending > 0);
--mNumPending;
if (mNumPending) {
return;
}
mPromise->Resolve(true, __func__);
}
void OnCompletion(Maybe<UntrustedModulesData>&& aResult) {
MOZ_ASSERT(NS_IsMainThread());
if (aResult.isSome()) {
mBackupSvc->Backup(BackupType::Staging, std::move(aResult.ref()));
}
OnCompletion();
}
private:
// Combinations of the flags defined under nsITelemetry.
// (See "Flags for getUntrustedModuleLoadEvents" in nsITelemetry.idl)
uint32_t mFlags;
RefPtr<UntrustedModulesBackupService> mBackupSvc;
RefPtr<MultiGetUntrustedModulesPromise::Private> mPromise;
size_t mNumPending;
};
RefPtr<MultiGetUntrustedModulesPromise>
MultiGetUntrustedModulesData::GetUntrustedModuleLoadEvents() {
MOZ_ASSERT(XRE_IsParentProcess() && NS_IsMainThread());
// Parent process
RefPtr<DllServices> dllSvc(DllServices::Get());
AddPending(dllSvc->GetUntrustedModulesData());
// Child processes
nsTArray<dom::ContentParent*> contentParents;
dom::ContentParent::GetAll(contentParents);
for (auto&& contentParent : contentParents) {
AddPending(contentParent->SendGetUntrustedModulesData());
}
if (RDDProcessManager* rddMgr = RDDProcessManager::Get()) {
if (RDDChild* rddChild = rddMgr->GetRDDChild()) {
AddPending(rddChild->SendGetUntrustedModulesData());
}
}
return mPromise;
}
void MultiGetUntrustedModulesData::Serialize(RefPtr<dom::Promise>&& aPromise) {
MOZ_ASSERT(NS_IsMainThread());
dom::AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.Init(aPromise->GetGlobalObject()))) {
aPromise->MaybeReject(NS_ERROR_FAILURE);
return;
}
JSContext* cx = jsapi.cx();
UntrustedModulesDataSerializer serializer(cx, kMaxModulesArrayLen, mFlags);
if (!serializer) {
aPromise->MaybeReject(NS_ERROR_FAILURE);
return;
}
nsresult rv;
if (mFlags & nsITelemetry::INCLUDE_OLD_LOADEVENTS) {
// When INCLUDE_OLD_LOADEVENTS is set, we need to return instances
// from both "Staging" and "Settled" backup.
if (mFlags & nsITelemetry::KEEP_LOADEVENTS_NEW) {
// When INCLUDE_OLD_LOADEVENTS and KEEP_LOADEVENTS_NEW are set, we need to
// return a JS object consisting of all instances from both "Staging" and
// "Settled" backups, keeping instances in those backups as is.
if (mFlags & nsITelemetry::EXCLUDE_STACKINFO_FROM_LOADEVENTS) {
// Without the stack info, we can add multiple UntrustedModulesData to
// the serializer directly.
rv = serializer.Add(mBackupSvc->Ref(BackupType::Staging));
if (NS_WARN_IF(NS_FAILED(rv))) {
aPromise->MaybeReject(rv);
return;
}
rv = serializer.Add(mBackupSvc->Ref(BackupType::Settled));
if (NS_WARN_IF(NS_FAILED(rv))) {
aPromise->MaybeReject(rv);
return;
}
} else {
// Currently we don't have a method to merge UntrustedModulesData into
// a serialized JS object because merging CombinedStack will be tricky.
// Thus we return an error on this flag combination.
aPromise->MaybeReject(NS_ERROR_INVALID_ARG);
return;
}
} else {
// When KEEP_LOADEVENTS_NEW is not set, we can move data from "Staging"
// to "Settled" first, then add "Settled" to the serializer.
mBackupSvc->SettleAllStagingData();
const UntrustedModulesBackupData& settledRef =
mBackupSvc->Ref(BackupType::Settled);
if (settledRef.IsEmpty()) {
aPromise->MaybeReject(NS_ERROR_NOT_AVAILABLE);
return;
}
rv = serializer.Add(settledRef);
if (NS_WARN_IF(NS_FAILED(rv))) {
aPromise->MaybeReject(rv);
return;
}
}
} else {
// When INCLUDE_OLD_LOADEVENTS is not set, we serialize only the "Staging"
// into a JS object.
const UntrustedModulesBackupData& stagingRef =
mBackupSvc->Ref(BackupType::Staging);
if (stagingRef.IsEmpty()) {
aPromise->MaybeReject(NS_ERROR_NOT_AVAILABLE);
return;
}
rv = serializer.Add(stagingRef);
if (NS_WARN_IF(NS_FAILED(rv))) {
aPromise->MaybeReject(rv);
return;
}
// When KEEP_LOADEVENTS_NEW is not set, we move all "Staging" instances
// to the "Settled".
if (!(mFlags & nsITelemetry::KEEP_LOADEVENTS_NEW)) {
mBackupSvc->SettleAllStagingData();
}
}
JS::RootedValue jsval(cx);
serializer.GetObject(&jsval);
aPromise->MaybeResolve(jsval);
}
nsresult GetUntrustedModuleLoadEvents(uint32_t aFlags, JSContext* cx,
dom::Promise** aPromise) {
// Create a promise using global context.
nsIGlobalObject* global = xpc::CurrentNativeGlobal(cx);
if (NS_WARN_IF(!global)) {
return NS_ERROR_FAILURE;
}
ErrorResult result;
RefPtr<dom::Promise> promise(dom::Promise::Create(global, result));
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
auto multi = MakeRefPtr<MultiGetUntrustedModulesData>(aFlags);
multi->GetUntrustedModuleLoadEvents()->Then(
GetMainThreadSerialEventTarget(), __func__,
[promise, multi](bool) mutable { multi->Serialize(std::move(promise)); },
[promise](nsresult aRv) { promise->MaybeReject(aRv); });
promise.forget(aPromise);
return NS_OK;
}
} // namespace Telemetry
} // namespace mozilla
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