Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* 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
#ifndef Telemetry_Comms_h__
#define Telemetry_Comms_h__
#include "ipc/IPCMessageUtils.h"
#include "ipc/IPCMessageUtilsSpecializations.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TelemetryProcessEnums.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Variant.h"
#include "mozilla/dom/WebGLIpdl.h"
#include "nsITelemetry.h"
namespace mozilla {
namespace Telemetry {
// Histogram accumulation types.
enum HistogramID : uint32_t;
struct HistogramAccumulation {
mozilla::Telemetry::HistogramID mId;
uint32_t mSample;
};
struct KeyedHistogramAccumulation {
mozilla::Telemetry::HistogramID mId;
uint32_t mSample;
nsCString mKey;
};
// Scalar accumulation types.
enum class ScalarID : uint32_t;
enum class ScalarActionType : uint32_t { eSet = 0, eAdd = 1, eSetMaximum = 2 };
typedef mozilla::Variant<uint32_t, bool, nsString> ScalarVariant;
struct ScalarAction {
uint32_t mId;
bool mDynamic;
ScalarActionType mActionType;
// We need to wrap mData in a Maybe otherwise the IPC system
// is unable to instantiate a ScalarAction.
Maybe<ScalarVariant> mData;
// The process type this scalar should be recorded for.
// The IPC system will determine the process this action was coming from
// later.
mozilla::Telemetry::ProcessID mProcessType;
};
struct KeyedScalarAction {
uint32_t mId;
bool mDynamic;
ScalarActionType mActionType;
nsCString mKey;
// We need to wrap mData in a Maybe otherwise the IPC system
// is unable to instantiate a ScalarAction.
Maybe<ScalarVariant> mData;
// The process type this scalar should be recorded for.
// The IPC system will determine the process this action was coming from
// later.
mozilla::Telemetry::ProcessID mProcessType;
};
// Dynamic scalars support.
struct DynamicScalarDefinition {
uint32_t type;
uint32_t dataset;
bool expired;
bool keyed;
bool builtin;
nsCString name;
bool operator==(const DynamicScalarDefinition& rhs) const {
return type == rhs.type && dataset == rhs.dataset &&
expired == rhs.expired && keyed == rhs.keyed &&
builtin == rhs.builtin && name.Equals(rhs.name);
}
};
struct ChildEventData {
mozilla::TimeStamp timestamp;
nsCString category;
nsCString method;
nsCString object;
mozilla::Maybe<nsCString> value;
CopyableTArray<EventExtraEntry> extra;
};
struct DiscardedData {
uint32_t mDiscardedHistogramAccumulations;
uint32_t mDiscardedKeyedHistogramAccumulations;
uint32_t mDiscardedScalarActions;
uint32_t mDiscardedKeyedScalarActions;
uint32_t mDiscardedChildEvents;
auto MutTiedFields() {
return std::tie(mDiscardedHistogramAccumulations,
mDiscardedKeyedHistogramAccumulations,
mDiscardedScalarActions, mDiscardedKeyedScalarActions,
mDiscardedChildEvents);
}
};
} // namespace Telemetry
} // namespace mozilla
namespace IPC {
template <>
struct ParamTraits<mozilla::Telemetry::HistogramAccumulation> {
typedef mozilla::Telemetry::HistogramAccumulation paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
aWriter->WriteUInt32(aParam.mId);
WriteParam(aWriter, aParam.mSample);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!aReader->ReadUInt32(reinterpret_cast<uint32_t*>(&(aResult->mId))) ||
!ReadParam(aReader, &(aResult->mSample))) {
return false;
}
return true;
}
};
template <>
struct ParamTraits<mozilla::Telemetry::KeyedHistogramAccumulation> {
typedef mozilla::Telemetry::KeyedHistogramAccumulation paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
aWriter->WriteUInt32(aParam.mId);
WriteParam(aWriter, aParam.mSample);
WriteParam(aWriter, aParam.mKey);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!aReader->ReadUInt32(reinterpret_cast<uint32_t*>(&(aResult->mId))) ||
!ReadParam(aReader, &(aResult->mSample)) ||
!ReadParam(aReader, &(aResult->mKey))) {
return false;
}
return true;
}
};
/**
* IPC scalar data message serialization and de-serialization.
*/
template <>
struct ParamTraits<mozilla::Telemetry::ScalarAction> {
typedef mozilla::Telemetry::ScalarAction paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
// Write the message type
aWriter->WriteUInt32(aParam.mId);
WriteParam(aWriter, aParam.mDynamic);
WriteParam(aWriter, static_cast<uint32_t>(aParam.mActionType));
if (aParam.mData.isNothing()) {
MOZ_CRASH("There is no data in the ScalarAction.");
return;
}
if (aParam.mData->is<uint32_t>()) {
// That's a nsITelemetry::SCALAR_TYPE_COUNT.
WriteParam(aWriter,
static_cast<uint32_t>(nsITelemetry::SCALAR_TYPE_COUNT));
WriteParam(aWriter, aParam.mData->as<uint32_t>());
} else if (aParam.mData->is<nsString>()) {
// That's a nsITelemetry::SCALAR_TYPE_STRING.
WriteParam(aWriter,
static_cast<uint32_t>(nsITelemetry::SCALAR_TYPE_STRING));
WriteParam(aWriter, aParam.mData->as<nsString>());
} else if (aParam.mData->is<bool>()) {
// That's a nsITelemetry::SCALAR_TYPE_BOOLEAN.
WriteParam(aWriter,
static_cast<uint32_t>(nsITelemetry::SCALAR_TYPE_BOOLEAN));
WriteParam(aWriter, aParam.mData->as<bool>());
} else {
MOZ_CRASH("Unknown scalar type.");
}
}
static bool Read(MessageReader* aReader, paramType* aResult) {
// Read the scalar ID and the scalar type.
uint32_t scalarType = 0;
if (!aReader->ReadUInt32(reinterpret_cast<uint32_t*>(&(aResult->mId))) ||
!ReadParam(aReader, reinterpret_cast<bool*>(&(aResult->mDynamic))) ||
!ReadParam(aReader,
reinterpret_cast<uint32_t*>(&(aResult->mActionType))) ||
!ReadParam(aReader, &scalarType)) {
return false;
}
// De-serialize the data based on the scalar type.
switch (scalarType) {
case nsITelemetry::SCALAR_TYPE_COUNT: {
uint32_t data = 0;
// De-serialize the data.
if (!ReadParam(aReader, &data)) {
return false;
}
aResult->mData = mozilla::Some(mozilla::AsVariant(data));
break;
}
case nsITelemetry::SCALAR_TYPE_STRING: {
nsString data;
// De-serialize the data.
if (!ReadParam(aReader, &data)) {
return false;
}
aResult->mData = mozilla::Some(mozilla::AsVariant(data));
break;
}
case nsITelemetry::SCALAR_TYPE_BOOLEAN: {
bool data = false;
// De-serialize the data.
if (!ReadParam(aReader, &data)) {
return false;
}
aResult->mData = mozilla::Some(mozilla::AsVariant(data));
break;
}
default:
MOZ_ASSERT(false, "Unknown scalar type.");
return false;
}
return true;
}
};
/**
* IPC keyed scalar data message serialization and de-serialization.
*/
template <>
struct ParamTraits<mozilla::Telemetry::KeyedScalarAction> {
typedef mozilla::Telemetry::KeyedScalarAction paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
// Write the message type
aWriter->WriteUInt32(static_cast<uint32_t>(aParam.mId));
WriteParam(aWriter, aParam.mDynamic);
WriteParam(aWriter, static_cast<uint32_t>(aParam.mActionType));
WriteParam(aWriter, aParam.mKey);
if (aParam.mData.isNothing()) {
MOZ_CRASH("There is no data in the KeyedScalarAction.");
return;
}
if (aParam.mData->is<uint32_t>()) {
// That's a nsITelemetry::SCALAR_TYPE_COUNT.
WriteParam(aWriter,
static_cast<uint32_t>(nsITelemetry::SCALAR_TYPE_COUNT));
WriteParam(aWriter, aParam.mData->as<uint32_t>());
} else if (aParam.mData->is<nsString>()) {
// That's a nsITelemetry::SCALAR_TYPE_STRING.
// Keyed string scalars are not supported.
MOZ_ASSERT(false,
"Keyed String Scalar unable to be write from child process. "
"Not supported.");
} else if (aParam.mData->is<bool>()) {
// That's a nsITelemetry::SCALAR_TYPE_BOOLEAN.
WriteParam(aWriter,
static_cast<uint32_t>(nsITelemetry::SCALAR_TYPE_BOOLEAN));
WriteParam(aWriter, aParam.mData->as<bool>());
} else {
MOZ_CRASH("Unknown keyed scalar type.");
}
}
static bool Read(MessageReader* aReader, paramType* aResult) {
// Read the scalar ID and the scalar type.
uint32_t scalarType = 0;
if (!aReader->ReadUInt32(reinterpret_cast<uint32_t*>(&(aResult->mId))) ||
!ReadParam(aReader, reinterpret_cast<bool*>(&(aResult->mDynamic))) ||
!ReadParam(aReader,
reinterpret_cast<uint32_t*>(&(aResult->mActionType))) ||
!ReadParam(aReader, &(aResult->mKey)) ||
!ReadParam(aReader, &scalarType)) {
return false;
}
// De-serialize the data based on the scalar type.
switch (scalarType) {
case nsITelemetry::SCALAR_TYPE_COUNT: {
uint32_t data = 0;
// De-serialize the data.
if (!ReadParam(aReader, &data)) {
return false;
}
aResult->mData = mozilla::Some(mozilla::AsVariant(data));
break;
}
case nsITelemetry::SCALAR_TYPE_STRING: {
// Keyed string scalars are not supported.
MOZ_ASSERT(false,
"Keyed String Scalar unable to be read from child process. "
"Not supported.");
return false;
}
case nsITelemetry::SCALAR_TYPE_BOOLEAN: {
bool data = false;
// De-serialize the data.
if (!ReadParam(aReader, &data)) {
return false;
}
aResult->mData = mozilla::Some(mozilla::AsVariant(data));
break;
}
default:
MOZ_ASSERT(false, "Unknown keyed scalar type.");
return false;
}
return true;
}
};
template <>
struct ParamTraits<mozilla::Telemetry::DynamicScalarDefinition> {
typedef mozilla::Telemetry::DynamicScalarDefinition paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
nsCString name;
WriteParam(aWriter, aParam.type);
WriteParam(aWriter, aParam.dataset);
WriteParam(aWriter, aParam.expired);
WriteParam(aWriter, aParam.keyed);
WriteParam(aWriter, aParam.builtin);
WriteParam(aWriter, aParam.name);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!ReadParam(aReader, reinterpret_cast<uint32_t*>(&(aResult->type))) ||
!ReadParam(aReader, reinterpret_cast<uint32_t*>(&(aResult->dataset))) ||
!ReadParam(aReader, reinterpret_cast<bool*>(&(aResult->expired))) ||
!ReadParam(aReader, reinterpret_cast<bool*>(&(aResult->keyed))) ||
!ReadParam(aReader, reinterpret_cast<bool*>(&(aResult->builtin))) ||
!ReadParam(aReader, &(aResult->name))) {
return false;
}
return true;
}
};
template <>
struct ParamTraits<mozilla::Telemetry::ChildEventData> {
typedef mozilla::Telemetry::ChildEventData paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
WriteParam(aWriter, aParam.timestamp);
WriteParam(aWriter, aParam.category);
WriteParam(aWriter, aParam.method);
WriteParam(aWriter, aParam.object);
WriteParam(aWriter, aParam.value);
WriteParam(aWriter, aParam.extra);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!ReadParam(aReader, &(aResult->timestamp)) ||
!ReadParam(aReader, &(aResult->category)) ||
!ReadParam(aReader, &(aResult->method)) ||
!ReadParam(aReader, &(aResult->object)) ||
!ReadParam(aReader, &(aResult->value)) ||
!ReadParam(aReader, &(aResult->extra))) {
return false;
}
return true;
}
};
template <>
struct ParamTraits<mozilla::Telemetry::EventExtraEntry> {
typedef mozilla::Telemetry::EventExtraEntry paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam) {
WriteParam(aWriter, aParam.key);
WriteParam(aWriter, aParam.value);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!ReadParam(aReader, &(aResult->key)) ||
!ReadParam(aReader, &(aResult->value))) {
return false;
}
return true;
}
};
template <>
struct ParamTraits<mozilla::Telemetry::DiscardedData>
: public ParamTraits_TiedFields<mozilla::Telemetry::DiscardedData> {};
} // namespace IPC
#endif // Telemetry_Comms_h__