forked from mirrors/gecko-dev
fffb25b74f
This was done automatically replacing: s/mozilla::Move/std::move/ s/ Move(/ std::move(/ s/(Move(/(std::move(/ Removing the 'using mozilla::Move;' lines. And then with a few manual fixups, see the bug for the split series.. MozReview-Commit-ID: Jxze3adipUh
3158 lines
102 KiB
C++
3158 lines
102 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "jsapi.h"
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#include "jsfriendapi.h"
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#include "js/GCAPI.h"
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#include "nsString.h"
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#include "nsTHashtable.h"
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#include "nsHashKeys.h"
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#include "nsBaseHashtable.h"
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#include "nsClassHashtable.h"
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#include "nsITelemetry.h"
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#include "nsPrintfCString.h"
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#include "mozilla/dom/ToJSValue.h"
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#include "mozilla/gfx/GPUProcessManager.h"
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#include "mozilla/Atomics.h"
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#include "mozilla/JSONWriter.h"
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#include "mozilla/StartupTimeline.h"
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#include "mozilla/StaticMutex.h"
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#include "mozilla/Unused.h"
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#include "TelemetryCommon.h"
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#include "TelemetryHistogram.h"
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#include "TelemetryScalar.h"
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#include "ipc/TelemetryIPCAccumulator.h"
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#include "base/histogram.h"
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#include <limits>
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using base::Histogram;
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using base::BooleanHistogram;
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using base::CountHistogram;
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using base::FlagHistogram;
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using base::LinearHistogram;
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using mozilla::MakeTuple;
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using mozilla::StaticMutex;
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using mozilla::StaticMutexAutoLock;
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using mozilla::Telemetry::HistogramAccumulation;
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using mozilla::Telemetry::KeyedHistogramAccumulation;
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using mozilla::Telemetry::HistogramID;
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using mozilla::Telemetry::ProcessID;
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using mozilla::Telemetry::HistogramCount;
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using mozilla::Telemetry::Common::LogToBrowserConsole;
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using mozilla::Telemetry::Common::RecordedProcessType;
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using mozilla::Telemetry::Common::AutoHashtable;
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using mozilla::Telemetry::Common::GetNameForProcessID;
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using mozilla::Telemetry::Common::GetIDForProcessName;
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using mozilla::Telemetry::Common::IsExpiredVersion;
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using mozilla::Telemetry::Common::CanRecordDataset;
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using mozilla::Telemetry::Common::CanRecordProduct;
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using mozilla::Telemetry::Common::SupportedProduct;
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using mozilla::Telemetry::Common::IsInDataset;
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using mozilla::Telemetry::Common::ToJSString;
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namespace TelemetryIPCAccumulator = mozilla::TelemetryIPCAccumulator;
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// Naming: there are two kinds of functions in this file:
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//
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// * Functions named internal_*: these can only be reached via an
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// interface function (TelemetryHistogram::*). They mostly expect
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// the interface function to have acquired
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// |gTelemetryHistogramMutex|, so they do not have to be
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// thread-safe. However, those internal_* functions that are
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// reachable from internal_WrapAndReturnHistogram and
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// internal_WrapAndReturnKeyedHistogram can sometimes be called
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// without |gTelemetryHistogramMutex|, and so might be racey.
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//
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// * Functions named TelemetryHistogram::*. This is the external interface.
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// Entries and exits to these functions are serialised using
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// |gTelemetryHistogramMutex|, except for GetKeyedHistogramSnapshots and
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// CreateHistogramSnapshots.
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//
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// Avoiding races and deadlocks:
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//
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// All functions in the external interface (TelemetryHistogram::*) are
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// serialised using the mutex |gTelemetryHistogramMutex|. This means
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// that the external interface is thread-safe, and many of the
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// internal_* functions can ignore thread safety. But it also brings
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// a danger of deadlock if any function in the external interface can
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// get back to that interface. That is, we will deadlock on any call
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// chain like this
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//
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// TelemetryHistogram::* -> .. any functions .. -> TelemetryHistogram::*
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//
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// To reduce the danger of that happening, observe the following rules:
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//
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// * No function in TelemetryHistogram::* may directly call, nor take the
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// address of, any other function in TelemetryHistogram::*.
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//
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// * No internal function internal_* may call, nor take the address
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// of, any function in TelemetryHistogram::*.
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//
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// internal_WrapAndReturnHistogram and
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// internal_WrapAndReturnKeyedHistogram are not protected by
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// |gTelemetryHistogramMutex| because they make calls to the JS
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// engine, but that can in turn call back to Telemetry and hence back
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// to a TelemetryHistogram:: function, in order to report GC and other
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// statistics. This would lead to deadlock due to attempted double
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// acquisition of |gTelemetryHistogramMutex|, if the internal_* functions
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// were required to be protected by |gTelemetryHistogramMutex|. To
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// break that cycle, we relax that requirement. Unfortunately this
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// means that this file is not guaranteed race-free.
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// This is a StaticMutex rather than a plain Mutex (1) so that
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// it gets initialised in a thread-safe manner the first time
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// it is used, and (2) because it is never de-initialised, and
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// a normal Mutex would show up as a leak in BloatView. StaticMutex
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// also has the "OffTheBooks" property, so it won't show as a leak
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// in BloatView.
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static StaticMutex gTelemetryHistogramMutex;
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// PRIVATE TYPES
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namespace {
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typedef nsDataHashtable<nsCStringHashKey, HistogramID> StringToHistogramIdMap;
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// Hardcoded probes
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struct HistogramInfo {
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uint32_t min;
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uint32_t max;
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uint32_t bucketCount;
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uint32_t histogramType;
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uint32_t name_offset;
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uint32_t expiration_offset;
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uint32_t dataset;
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uint32_t label_index;
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uint32_t label_count;
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uint32_t key_index;
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uint32_t key_count;
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RecordedProcessType record_in_processes;
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bool keyed;
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SupportedProduct products;
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const char *name() const;
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const char *expiration() const;
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nsresult label_id(const char* label, uint32_t* labelId) const;
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bool allows_key(const nsACString& key) const;
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};
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// Structs used to keep information about the histograms for which a
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// snapshot should be created.
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struct HistogramSnapshotData {
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nsTArray<Histogram::Sample> mBucketRanges;
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nsTArray<Histogram::Count> mBucketCounts;
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int64_t mSampleSum; // Same type as Histogram::SampleSet::sum_
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};
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struct HistogramSnapshotInfo {
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HistogramSnapshotData data;
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HistogramID histogramID;
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};
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typedef mozilla::Vector<HistogramSnapshotInfo> HistogramSnapshotsArray;
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typedef mozilla::Vector<HistogramSnapshotsArray> HistogramProcessSnapshotsArray;
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// The following is used to handle snapshot information for keyed histograms.
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typedef nsDataHashtable<nsCStringHashKey, HistogramSnapshotData> KeyedHistogramSnapshotData;
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struct KeyedHistogramSnapshotInfo {
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KeyedHistogramSnapshotData data;
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HistogramID histogramId;
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};
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typedef mozilla::Vector<KeyedHistogramSnapshotInfo> KeyedHistogramSnapshotsArray;
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typedef mozilla::Vector<KeyedHistogramSnapshotsArray> KeyedHistogramProcessSnapshotsArray;
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class KeyedHistogram {
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public:
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KeyedHistogram(HistogramID id, const HistogramInfo& info);
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~KeyedHistogram();
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nsresult GetHistogram(const nsCString& name, Histogram** histogram);
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Histogram* GetHistogram(const nsCString& name);
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uint32_t GetHistogramType() const { return mHistogramInfo.histogramType; }
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nsresult GetJSKeys(JSContext* cx, JS::CallArgs& args);
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// Note: unlike other methods, GetJSSnapshot is thread safe.
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nsresult GetJSSnapshot(JSContext* cx, JS::Handle<JSObject*> obj,
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bool clearSubsession);
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nsresult GetSnapshot(const StaticMutexAutoLock& aLock,
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KeyedHistogramSnapshotData& aSnapshot, bool aClearSubsession);
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nsresult Add(const nsCString& key, uint32_t aSample, ProcessID aProcessType);
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void Clear();
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HistogramID GetHistogramID() const { return mId; }
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bool IsEmpty() const { return mHistogramMap.IsEmpty(); }
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private:
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typedef nsBaseHashtableET<nsCStringHashKey, Histogram*> KeyedHistogramEntry;
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typedef AutoHashtable<KeyedHistogramEntry> KeyedHistogramMapType;
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KeyedHistogramMapType mHistogramMap;
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const HistogramID mId;
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const HistogramInfo& mHistogramInfo;
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};
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} // namespace
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// PRIVATE STATE, SHARED BY ALL THREADS
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namespace {
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// Set to true once this global state has been initialized
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bool gInitDone = false;
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// Whether we are collecting the base, opt-out, Histogram data.
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bool gCanRecordBase = false;
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// Whether we are collecting the extended, opt-in, Histogram data.
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bool gCanRecordExtended = false;
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// The storage for actual Histogram instances.
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// We use separate ones for plain and keyed histograms.
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Histogram** gHistogramStorage;
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// Keyed histograms internally map string keys to individual Histogram instances.
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KeyedHistogram** gKeyedHistogramStorage;
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// Cache of histogram name to a histogram id.
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StringToHistogramIdMap gNameToHistogramIDMap(HistogramCount);
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// To simplify logic below we use a single histogram instance for all expired histograms.
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Histogram* gExpiredHistogram = nullptr;
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// This tracks whether recording is enabled for specific histograms.
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// To utilize C++ initialization rules, we invert the meaning to "disabled".
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bool gHistogramRecordingDisabled[HistogramCount] = {};
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// This is for gHistogramInfos, gHistogramStringTable
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#include "TelemetryHistogramData.inc"
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} // namespace
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// PRIVATE CONSTANTS
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namespace {
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// List of histogram IDs which should have recording disabled initially.
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const HistogramID kRecordingInitiallyDisabledIDs[] = {
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mozilla::Telemetry::FX_REFRESH_DRIVER_SYNC_SCROLL_FRAME_DELAY_MS,
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// The array must not be empty. Leave these item here.
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mozilla::Telemetry::TELEMETRY_TEST_COUNT_INIT_NO_RECORD,
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mozilla::Telemetry::TELEMETRY_TEST_KEYED_COUNT_INIT_NO_RECORD
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};
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} // namespace
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// The core storage access functions.
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// They wrap access to the histogram storage and lookup caches.
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namespace {
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size_t internal_KeyedHistogramStorageIndex(HistogramID aHistogramId,
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ProcessID aProcessId)
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{
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return aHistogramId * size_t(ProcessID::Count) + size_t(aProcessId);
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}
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size_t internal_HistogramStorageIndex(const StaticMutexAutoLock& aLock,
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HistogramID aHistogramId,
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ProcessID aProcessId)
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{
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static_assert(
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HistogramCount <
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std::numeric_limits<size_t>::max() / size_t(ProcessID::Count),
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"Too many histograms and processes to store in a 1D array.");
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return aHistogramId * size_t(ProcessID::Count) + size_t(aProcessId);
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}
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Histogram* internal_GetHistogramFromStorage(const StaticMutexAutoLock& aLock,
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HistogramID aHistogramId,
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ProcessID aProcessId)
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{
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size_t index = internal_HistogramStorageIndex(aLock, aHistogramId, aProcessId);
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return gHistogramStorage[index];
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}
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void internal_SetHistogramInStorage(const StaticMutexAutoLock& aLock,
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HistogramID aHistogramId,
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ProcessID aProcessId,
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Histogram* aHistogram)
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{
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MOZ_ASSERT(XRE_IsParentProcess(),
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"Histograms are stored only in the parent process.");
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size_t index = internal_HistogramStorageIndex(aLock, aHistogramId, aProcessId);
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MOZ_ASSERT(!gHistogramStorage[index],
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"Mustn't overwrite storage without clearing it first.");
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gHistogramStorage[index] = aHistogram;
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}
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KeyedHistogram* internal_GetKeyedHistogramFromStorage(HistogramID aHistogramId,
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ProcessID aProcessId)
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{
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size_t index = internal_KeyedHistogramStorageIndex(aHistogramId, aProcessId);
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return gKeyedHistogramStorage[index];
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}
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void internal_SetKeyedHistogramInStorage(HistogramID aHistogramId,
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ProcessID aProcessId,
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KeyedHistogram* aKeyedHistogram)
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{
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MOZ_ASSERT(XRE_IsParentProcess(),
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"Keyed Histograms are stored only in the parent process.");
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size_t index = internal_KeyedHistogramStorageIndex(aHistogramId, aProcessId);
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MOZ_ASSERT(!gKeyedHistogramStorage[index],
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"Mustn't overwrite storage without clearing it first");
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gKeyedHistogramStorage[index] = aKeyedHistogram;
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}
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// Factory function for histogram instances.
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Histogram*
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internal_CreateHistogramInstance(const HistogramInfo& info, int bucketsOffset);
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bool
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internal_IsHistogramEnumId(HistogramID aID)
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{
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static_assert(((HistogramID)-1 > 0), "ID should be unsigned.");
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return aID < HistogramCount;
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}
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// Look up a plain histogram by id.
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Histogram*
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internal_GetHistogramById(const StaticMutexAutoLock& aLock,
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HistogramID histogramId,
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ProcessID processId,
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bool instantiate = true)
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{
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MOZ_ASSERT(internal_IsHistogramEnumId(histogramId));
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MOZ_ASSERT(!gHistogramInfos[histogramId].keyed);
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MOZ_ASSERT(processId < ProcessID::Count);
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Histogram* h = internal_GetHistogramFromStorage(aLock, histogramId, processId);
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if (h || !instantiate) {
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return h;
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}
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const HistogramInfo& info = gHistogramInfos[histogramId];
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const int bucketsOffset = gHistogramBucketLowerBoundIndex[histogramId];
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h = internal_CreateHistogramInstance(info, bucketsOffset);
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MOZ_ASSERT(h);
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internal_SetHistogramInStorage(aLock, histogramId, processId, h);
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return h;
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}
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// Look up a keyed histogram by id.
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KeyedHistogram*
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internal_GetKeyedHistogramById(HistogramID histogramId, ProcessID processId,
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bool instantiate = true)
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{
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MOZ_ASSERT(internal_IsHistogramEnumId(histogramId));
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MOZ_ASSERT(gHistogramInfos[histogramId].keyed);
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MOZ_ASSERT(processId < ProcessID::Count);
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KeyedHistogram* kh = internal_GetKeyedHistogramFromStorage(histogramId,
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processId);
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if (kh || !instantiate) {
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return kh;
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}
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const HistogramInfo& info = gHistogramInfos[histogramId];
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kh = new KeyedHistogram(histogramId, info);
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internal_SetKeyedHistogramInStorage(histogramId, processId, kh);
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return kh;
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}
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// Look up a histogram id from a histogram name.
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nsresult
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internal_GetHistogramIdByName(const StaticMutexAutoLock& aLock,
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const nsACString& name,
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HistogramID* id)
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{
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const bool found = gNameToHistogramIDMap.Get(name, id);
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if (!found) {
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return NS_ERROR_ILLEGAL_VALUE;
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}
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return NS_OK;
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}
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// Clear a histogram from storage.
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void
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internal_ClearHistogramById(const StaticMutexAutoLock& aLock,
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HistogramID histogramId,
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ProcessID processId)
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{
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size_t index = internal_HistogramStorageIndex(aLock, histogramId, processId);
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if (gHistogramStorage[index] == gExpiredHistogram) {
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// We keep gExpiredHistogram until TelemetryHistogram::DeInitializeGlobalState
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return;
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}
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delete gHistogramStorage[index];
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gHistogramStorage[index] = nullptr;
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}
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}
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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//
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// PRIVATE: Misc small helpers
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namespace {
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bool
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internal_CanRecordBase() {
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return gCanRecordBase;
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}
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bool
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internal_CanRecordExtended() {
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return gCanRecordExtended;
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}
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bool
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internal_AttemptedGPUProcess() {
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// Check if it was tried to launch a process.
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bool attemptedGPUProcess = false;
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if (auto gpm = mozilla::gfx::GPUProcessManager::Get()) {
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attemptedGPUProcess = gpm->AttemptedGPUProcess();
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}
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return attemptedGPUProcess;
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}
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// Note: this is completely unrelated to mozilla::IsEmpty.
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bool
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internal_IsEmpty(const StaticMutexAutoLock& aLock, const Histogram *h)
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{
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return h->is_empty();
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}
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bool
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internal_IsExpired(const StaticMutexAutoLock& aLock, Histogram* h)
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{
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return h == gExpiredHistogram;
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}
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void
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internal_SetHistogramRecordingEnabled(const StaticMutexAutoLock& aLock,
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HistogramID id,
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bool aEnabled)
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{
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MOZ_ASSERT(internal_IsHistogramEnumId(id));
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gHistogramRecordingDisabled[id] = !aEnabled;
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}
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bool
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internal_IsRecordingEnabled(HistogramID id)
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{
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MOZ_ASSERT(internal_IsHistogramEnumId(id));
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return !gHistogramRecordingDisabled[id];
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}
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const char *
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HistogramInfo::name() const
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{
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return &gHistogramStringTable[this->name_offset];
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}
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const char *
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HistogramInfo::expiration() const
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{
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return &gHistogramStringTable[this->expiration_offset];
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}
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nsresult
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HistogramInfo::label_id(const char* label, uint32_t* labelId) const
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{
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MOZ_ASSERT(label);
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MOZ_ASSERT(this->histogramType == nsITelemetry::HISTOGRAM_CATEGORICAL);
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if (this->histogramType != nsITelemetry::HISTOGRAM_CATEGORICAL) {
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return NS_ERROR_FAILURE;
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}
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for (uint32_t i = 0; i < this->label_count; ++i) {
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// gHistogramLabelTable contains the indices of the label strings in the
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// gHistogramStringTable.
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// They are stored in-order and consecutively, from the offset label_index
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// to (label_index + label_count).
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|
uint32_t string_offset = gHistogramLabelTable[this->label_index + i];
|
|
const char* const str = &gHistogramStringTable[string_offset];
|
|
if (::strcmp(label, str) == 0) {
|
|
*labelId = i;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool
|
|
HistogramInfo::allows_key(const nsACString& key) const
|
|
{
|
|
MOZ_ASSERT(this->keyed);
|
|
|
|
// If we didn't specify a list of allowed keys, just return true.
|
|
if (this->key_count == 0) {
|
|
return true;
|
|
}
|
|
|
|
// Otherwise, check if |key| is in the list of allowed keys.
|
|
for (uint32_t i = 0; i < this->key_count; ++i) {
|
|
// gHistogramKeyTable contains the indices of the key strings in the
|
|
// gHistogramStringTable. They are stored in-order and consecutively,
|
|
// from the offset key_index to (key_index + key_count).
|
|
uint32_t string_offset = gHistogramKeyTable[this->key_index + i];
|
|
const char* const str = &gHistogramStringTable[string_offset];
|
|
if (key.EqualsASCII(str)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// |key| was not found.
|
|
return false;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: Histogram Get, Add, Clone, Clear functions
|
|
|
|
namespace {
|
|
|
|
nsresult
|
|
internal_CheckHistogramArguments(const HistogramInfo& info)
|
|
{
|
|
if (info.histogramType != nsITelemetry::HISTOGRAM_BOOLEAN
|
|
&& info.histogramType != nsITelemetry::HISTOGRAM_FLAG
|
|
&& info.histogramType != nsITelemetry::HISTOGRAM_COUNT) {
|
|
// Sanity checks for histogram parameters.
|
|
if (info.min >= info.max) {
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
}
|
|
|
|
if (info.bucketCount <= 2) {
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
}
|
|
|
|
if (info.min < 1) {
|
|
return NS_ERROR_ILLEGAL_VALUE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
Histogram*
|
|
internal_CreateHistogramInstance(const HistogramInfo& passedInfo, int bucketsOffset)
|
|
{
|
|
if (NS_FAILED(internal_CheckHistogramArguments(passedInfo))) {
|
|
MOZ_ASSERT(false, "Failed histogram argument checks.");
|
|
return nullptr;
|
|
}
|
|
|
|
// To keep the code simple we map all the calls to expired histograms to the same histogram instance.
|
|
// We create that instance lazily when needed.
|
|
const bool isExpired = IsExpiredVersion(passedInfo.expiration());
|
|
HistogramInfo info = passedInfo;
|
|
const int* buckets = &gHistogramBucketLowerBounds[bucketsOffset];
|
|
|
|
if (isExpired) {
|
|
if (gExpiredHistogram) {
|
|
return gExpiredHistogram;
|
|
}
|
|
|
|
// The first values in gHistogramBucketLowerBounds are reserved for
|
|
// expired histograms.
|
|
buckets = gHistogramBucketLowerBounds;
|
|
info.min = 1;
|
|
info.max = 2;
|
|
info.bucketCount = 3;
|
|
info.histogramType = nsITelemetry::HISTOGRAM_LINEAR;
|
|
}
|
|
|
|
Histogram::Flags flags = Histogram::kNoFlags;
|
|
Histogram* h = nullptr;
|
|
switch (info.histogramType) {
|
|
case nsITelemetry::HISTOGRAM_EXPONENTIAL:
|
|
h = Histogram::FactoryGet(info.min, info.max, info.bucketCount, flags, buckets);
|
|
break;
|
|
case nsITelemetry::HISTOGRAM_LINEAR:
|
|
case nsITelemetry::HISTOGRAM_CATEGORICAL:
|
|
h = LinearHistogram::FactoryGet(info.min, info.max, info.bucketCount, flags, buckets);
|
|
break;
|
|
case nsITelemetry::HISTOGRAM_BOOLEAN:
|
|
h = BooleanHistogram::FactoryGet(flags, buckets);
|
|
break;
|
|
case nsITelemetry::HISTOGRAM_FLAG:
|
|
h = FlagHistogram::FactoryGet(flags, buckets);
|
|
break;
|
|
case nsITelemetry::HISTOGRAM_COUNT:
|
|
h = CountHistogram::FactoryGet(flags, buckets);
|
|
break;
|
|
default:
|
|
MOZ_ASSERT(false, "Invalid histogram type");
|
|
return nullptr;
|
|
}
|
|
|
|
if (isExpired) {
|
|
gExpiredHistogram = h;
|
|
}
|
|
|
|
return h;
|
|
}
|
|
|
|
nsresult
|
|
internal_HistogramAdd(const StaticMutexAutoLock& aLock,
|
|
Histogram& histogram,
|
|
const HistogramID id,
|
|
uint32_t value,
|
|
ProcessID aProcessType)
|
|
{
|
|
// Check if we are allowed to record the data.
|
|
bool canRecordDataset = CanRecordDataset(gHistogramInfos[id].dataset,
|
|
internal_CanRecordBase(),
|
|
internal_CanRecordExtended());
|
|
// If `histogram` is a non-parent-process histogram, then recording-enabled
|
|
// has been checked in its owner process.
|
|
if (!canRecordDataset ||
|
|
(aProcessType == ProcessID::Parent && !internal_IsRecordingEnabled(id))) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Don't record if the current platform is not enabled
|
|
if (!CanRecordProduct(gHistogramInfos[id].products)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// The internal representation of a base::Histogram's buckets uses `int`.
|
|
// Clamp large values of `value` to be INT_MAX so they continue to be treated
|
|
// as large values (instead of negative ones).
|
|
if (value > INT_MAX) {
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_CLAMPED_VALUES,
|
|
NS_ConvertASCIItoUTF16(gHistogramInfos[id].name()), 1);
|
|
value = INT_MAX;
|
|
}
|
|
|
|
histogram.Add(value);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: Histogram reflection helpers
|
|
|
|
namespace {
|
|
|
|
/**
|
|
* Copy histograms and samples to Mozilla-friendly structures.
|
|
* Please note that this version does not make use of JS contexts.
|
|
*
|
|
* @param {StaticMutexAutoLock} the proof we hold the mutex.
|
|
* @param {Histogram} the histogram to reflect.
|
|
* @return {nsresult} NS_ERROR_FAILURE if we fail to allocate memory for the snapshot.
|
|
*/
|
|
nsresult
|
|
internal_GetHistogramAndSamples(const StaticMutexAutoLock& aLock,
|
|
const Histogram *h,
|
|
HistogramSnapshotData& aSnapshot)
|
|
{
|
|
MOZ_ASSERT(h);
|
|
|
|
// Convert the ranges of the buckets to a nsTArray.
|
|
const size_t bucketCount = h->bucket_count();
|
|
for (size_t i = 0; i < bucketCount; i++) {
|
|
if (!aSnapshot.mBucketRanges.AppendElement(h->ranges(i))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Get a snapshot of the samples.
|
|
Histogram::SampleSet ss;
|
|
h->SnapshotSample(&ss);
|
|
|
|
// Get the number of samples in each bucket.
|
|
for (size_t i = 0; i < bucketCount; i++) {
|
|
if (!aSnapshot.mBucketCounts.AppendElement(ss.counts(i))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Finally, save the |sum|. We don't need to reflect declared_min, declared_max and
|
|
// histogram_type as they are in gHistogramInfo.
|
|
aSnapshot.mSampleSum = ss.sum();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
internal_ReflectHistogramAndSamples(JSContext *cx,
|
|
JS::Handle<JSObject*> obj,
|
|
const HistogramInfo& aHistogramInfo,
|
|
const HistogramSnapshotData& aSnapshot)
|
|
{
|
|
if (!(JS_DefineProperty(cx, obj, "min",
|
|
aHistogramInfo.min, JSPROP_ENUMERATE)
|
|
&& JS_DefineProperty(cx, obj, "max",
|
|
aHistogramInfo.max, JSPROP_ENUMERATE)
|
|
&& JS_DefineProperty(cx, obj, "histogram_type",
|
|
aHistogramInfo.histogramType, JSPROP_ENUMERATE)
|
|
&& JS_DefineProperty(cx, obj, "sum",
|
|
double(aSnapshot.mSampleSum), JSPROP_ENUMERATE))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Don't rely on the bucket counts from "aHistogramInfo": it may
|
|
// differ from the length of aSnapshot.mBucketCounts due to expired
|
|
// histograms.
|
|
const size_t count = aSnapshot.mBucketCounts.Length();
|
|
MOZ_ASSERT(count == aSnapshot.mBucketRanges.Length(),
|
|
"The number of buckets and the number of counts must match.");
|
|
|
|
// Create the "ranges" property and add it to the final object.
|
|
JS::Rooted<JSObject*> rarray(cx, JS_NewArrayObject(cx, count));
|
|
if (!rarray
|
|
|| !JS_DefineProperty(cx, obj, "ranges", rarray, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Fill the "ranges" property.
|
|
for (size_t i = 0; i < count; i++) {
|
|
if (!JS_DefineElement(cx, rarray, i, aSnapshot.mBucketRanges[i], JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
JS::Rooted<JSObject*> counts_array(cx, JS_NewArrayObject(cx, count));
|
|
if (!counts_array
|
|
|| !JS_DefineProperty(cx, obj, "counts", counts_array, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Fill the "counts" property.
|
|
for (size_t i = 0; i < count; i++) {
|
|
if (!JS_DefineElement(cx, counts_array, i, aSnapshot.mBucketCounts[i], JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
internal_ShouldReflectHistogram(const StaticMutexAutoLock& aLock, Histogram* h, HistogramID id)
|
|
{
|
|
// Only flag histograms are serialized when they are empty.
|
|
// This has historical reasons, changing this will require downstream changes.
|
|
// The cheaper path here is to just deprecate flag histograms in favor
|
|
// of scalars.
|
|
uint32_t type = gHistogramInfos[id].histogramType;
|
|
if (internal_IsEmpty(aLock, h) && type != nsITelemetry::HISTOGRAM_FLAG) {
|
|
return false;
|
|
}
|
|
|
|
// Don't reflect the histogram if it's not allowed in this product.
|
|
if (!CanRecordProduct(gHistogramInfos[id].products)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Helper function to get a snapshot of the histograms.
|
|
*
|
|
* @param {aLock} the lock proof.
|
|
* @param {aDataset} the dataset for which the snapshot is being requested.
|
|
* @param {aClearSubsession} whether or not to clear the data after
|
|
* taking the snapshot.
|
|
* @param {aIncludeGPU} whether or not to include data for the GPU.
|
|
* @param {aOutSnapshot} the container in which the snapshot data will be stored.
|
|
* @return {nsresult} NS_OK if the snapshot was successfully taken or
|
|
* NS_ERROR_OUT_OF_MEMORY if it failed to allocate memory.
|
|
*/
|
|
nsresult
|
|
internal_GetHistogramsSnapshot(const StaticMutexAutoLock& aLock,
|
|
unsigned int aDataset,
|
|
bool aClearSubsession,
|
|
bool aIncludeGPU,
|
|
HistogramProcessSnapshotsArray& aOutSnapshot)
|
|
{
|
|
if (!aOutSnapshot.resize(static_cast<uint32_t>(ProcessID::Count))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
for (uint32_t process = 0; process < static_cast<uint32_t>(ProcessID::Count); ++process) {
|
|
HistogramSnapshotsArray& hArray = aOutSnapshot[process];
|
|
|
|
for (size_t i = 0; i < HistogramCount; ++i) {
|
|
const HistogramInfo& info = gHistogramInfos[i];
|
|
if (info.keyed) {
|
|
continue;
|
|
}
|
|
|
|
HistogramID id = HistogramID(i);
|
|
|
|
if (!CanRecordInProcess(info.record_in_processes, ProcessID(process)) ||
|
|
((ProcessID(process) == ProcessID::Gpu) && !aIncludeGPU)) {
|
|
continue;
|
|
}
|
|
|
|
if (!IsInDataset(info.dataset, aDataset)) {
|
|
continue;
|
|
}
|
|
|
|
bool shouldInstantiate =
|
|
info.histogramType == nsITelemetry::HISTOGRAM_FLAG;
|
|
Histogram* h = internal_GetHistogramById(aLock, id, ProcessID(process),
|
|
shouldInstantiate);
|
|
if (!h || internal_IsExpired(aLock, h) || !internal_ShouldReflectHistogram(aLock, h, id)) {
|
|
continue;
|
|
}
|
|
|
|
HistogramSnapshotData snapshotData;
|
|
if (NS_FAILED(internal_GetHistogramAndSamples(aLock, h, snapshotData))) {
|
|
continue;
|
|
}
|
|
|
|
if (!hArray.emplaceBack(HistogramSnapshotInfo{snapshotData, id})) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
if (aClearSubsession) {
|
|
h->Clear();
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: class KeyedHistogram and internal_ReflectKeyedHistogram
|
|
|
|
namespace {
|
|
|
|
nsresult
|
|
internal_ReflectKeyedHistogram(const KeyedHistogramSnapshotData& aSnapshot,
|
|
const HistogramInfo& info,
|
|
JSContext* aCx, JS::Handle<JSObject*> aObj)
|
|
{
|
|
for (auto iter = aSnapshot.ConstIter(); !iter.Done(); iter.Next()) {
|
|
HistogramSnapshotData& keyData = iter.Data();
|
|
|
|
JS::RootedObject histogramSnapshot(aCx, JS_NewPlainObject(aCx));
|
|
if (!histogramSnapshot) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (NS_FAILED(internal_ReflectHistogramAndSamples(aCx, histogramSnapshot,
|
|
info,
|
|
keyData))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
const NS_ConvertUTF8toUTF16 key(iter.Key());
|
|
if (!JS_DefineUCProperty(aCx, aObj, key.Data(), key.Length(),
|
|
histogramSnapshot, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
KeyedHistogram::KeyedHistogram(HistogramID id, const HistogramInfo& info)
|
|
: mHistogramMap()
|
|
, mId(id)
|
|
, mHistogramInfo(info)
|
|
{
|
|
}
|
|
|
|
KeyedHistogram::~KeyedHistogram()
|
|
{
|
|
for (auto iter = mHistogramMap.Iter(); !iter.Done(); iter.Next()) {
|
|
Histogram* h = iter.Get()->mData;
|
|
if (h == gExpiredHistogram) {
|
|
continue;
|
|
}
|
|
delete h;
|
|
}
|
|
mHistogramMap.Clear();
|
|
}
|
|
|
|
nsresult
|
|
KeyedHistogram::GetHistogram(const nsCString& key, Histogram** histogram)
|
|
{
|
|
KeyedHistogramEntry* entry = mHistogramMap.GetEntry(key);
|
|
if (entry) {
|
|
*histogram = entry->mData;
|
|
return NS_OK;
|
|
}
|
|
|
|
int bucketsOffset = gHistogramBucketLowerBoundIndex[mId];
|
|
Histogram* h = internal_CreateHistogramInstance(mHistogramInfo, bucketsOffset);
|
|
if (!h) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
h->ClearFlags(Histogram::kUmaTargetedHistogramFlag);
|
|
*histogram = h;
|
|
|
|
entry = mHistogramMap.PutEntry(key);
|
|
if (MOZ_UNLIKELY(!entry)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
entry->mData = h;
|
|
return NS_OK;
|
|
}
|
|
|
|
Histogram*
|
|
KeyedHistogram::GetHistogram(const nsCString& key)
|
|
{
|
|
Histogram* h = nullptr;
|
|
if (NS_FAILED(GetHistogram(key, &h))) {
|
|
return nullptr;
|
|
}
|
|
return h;
|
|
}
|
|
|
|
nsresult
|
|
KeyedHistogram::Add(const nsCString& key, uint32_t sample,
|
|
ProcessID aProcessType)
|
|
{
|
|
bool canRecordDataset = CanRecordDataset(mHistogramInfo.dataset,
|
|
internal_CanRecordBase(),
|
|
internal_CanRecordExtended());
|
|
// If `histogram` is a non-parent-process histogram, then recording-enabled
|
|
// has been checked in its owner process.
|
|
if (!canRecordDataset ||
|
|
(aProcessType == ProcessID::Parent && !internal_IsRecordingEnabled(mId))) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Don't record if the current platform is not enabled
|
|
if (!CanRecordProduct(gHistogramInfos[mId].products)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
Histogram* histogram = GetHistogram(key);
|
|
MOZ_ASSERT(histogram);
|
|
if (!histogram) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// The internal representation of a base::Histogram's buckets uses `int`.
|
|
// Clamp large values of `sample` to be INT_MAX so they continue to be treated
|
|
// as large values (instead of negative ones).
|
|
if (sample > INT_MAX) {
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_CLAMPED_VALUES,
|
|
NS_ConvertASCIItoUTF16(mHistogramInfo.name()), 1);
|
|
sample = INT_MAX;
|
|
}
|
|
|
|
histogram->Add(sample);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
KeyedHistogram::Clear()
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
if (!XRE_IsParentProcess()) {
|
|
return;
|
|
}
|
|
|
|
for (auto iter = mHistogramMap.Iter(); !iter.Done(); iter.Next()) {
|
|
Histogram* h = iter.Get()->mData;
|
|
if (h == gExpiredHistogram) {
|
|
continue;
|
|
}
|
|
delete h;
|
|
}
|
|
mHistogramMap.Clear();
|
|
}
|
|
|
|
nsresult
|
|
KeyedHistogram::GetJSKeys(JSContext* cx, JS::CallArgs& args)
|
|
{
|
|
JS::AutoValueVector keys(cx);
|
|
if (!keys.reserve(mHistogramMap.Count())) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
for (auto iter = mHistogramMap.Iter(); !iter.Done(); iter.Next()) {
|
|
JS::RootedValue jsKey(cx);
|
|
jsKey.setString(ToJSString(cx, iter.Get()->GetKey()));
|
|
if (!keys.append(jsKey)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
JS::RootedObject jsKeys(cx, JS_NewArrayObject(cx, keys));
|
|
if (!jsKeys) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
args.rval().setObject(*jsKeys);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
KeyedHistogram::GetJSSnapshot(JSContext* cx, JS::Handle<JSObject*> obj, bool clearSubsession)
|
|
{
|
|
// Get a snapshot of the data.
|
|
KeyedHistogramSnapshotData dataSnapshot;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(mId));
|
|
|
|
// Take a snapshot of the data here, protected by the lock, and then,
|
|
// outside of the lock protection, mirror it to a JS structure.
|
|
if (NS_FAILED(GetSnapshot(locker, dataSnapshot, clearSubsession))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Now that we have a copy of the data, mirror it to JS.
|
|
return internal_ReflectKeyedHistogram(dataSnapshot, gHistogramInfos[mId], cx, obj);
|
|
}
|
|
|
|
nsresult
|
|
KeyedHistogram::GetSnapshot(const StaticMutexAutoLock& aLock,
|
|
KeyedHistogramSnapshotData& aSnapshot, bool aClearSubsession)
|
|
{
|
|
// Snapshot every key.
|
|
for (auto iter = mHistogramMap.ConstIter(); !iter.Done(); iter.Next()) {
|
|
Histogram* keyData = iter.Get()->mData;
|
|
if (!keyData) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
HistogramSnapshotData keySnapshot;
|
|
if (NS_FAILED(internal_GetHistogramAndSamples(aLock, keyData, keySnapshot))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Append to the final snapshot.
|
|
aSnapshot.Put(iter.Get()->GetKey(), std::move(keySnapshot));
|
|
}
|
|
|
|
if (aClearSubsession) {
|
|
Clear();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
/**
|
|
* Helper function to get a snapshot of the keyed histograms.
|
|
*
|
|
* @param {aLock} the lock proof.
|
|
* @param {aDataset} the dataset for which the snapshot is being requested.
|
|
* @param {aClearSubsession} whether or not to clear the data after
|
|
* taking the snapshot.
|
|
* @param {aIncludeGPU} whether or not to include data for the GPU.
|
|
* @param {aOutSnapshot} the container in which the snapshot data will be stored.
|
|
* @param {aSkipEmpty} whether or not to skip empty keyed histograms from the
|
|
* snapshot. Can't always assume "true" for consistency with the other
|
|
* callers.
|
|
* @return {nsresult} NS_OK if the snapshot was successfully taken or
|
|
* NS_ERROR_OUT_OF_MEMORY if it failed to allocate memory.
|
|
*/
|
|
nsresult
|
|
internal_GetKeyedHistogramsSnapshot(const StaticMutexAutoLock& aLock,
|
|
unsigned int aDataset,
|
|
bool aClearSubsession,
|
|
bool aIncludeGPU,
|
|
KeyedHistogramProcessSnapshotsArray& aOutSnapshot,
|
|
bool aSkipEmpty = false)
|
|
{
|
|
if (!aOutSnapshot.resize(static_cast<uint32_t>(ProcessID::Count))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
for (uint32_t process = 0; process < static_cast<uint32_t>(ProcessID::Count); ++process) {
|
|
KeyedHistogramSnapshotsArray& hArray = aOutSnapshot[process];
|
|
|
|
for (size_t i = 0; i < HistogramCount; ++i) {
|
|
HistogramID id = HistogramID(i);
|
|
const HistogramInfo& info = gHistogramInfos[id];
|
|
if (!info.keyed) {
|
|
continue;
|
|
}
|
|
|
|
if (!CanRecordInProcess(info.record_in_processes, ProcessID(process)) ||
|
|
((ProcessID(process) == ProcessID::Gpu) && !aIncludeGPU)) {
|
|
continue;
|
|
}
|
|
|
|
if (!IsInDataset(info.dataset, aDataset)) {
|
|
continue;
|
|
}
|
|
|
|
KeyedHistogram* keyed = internal_GetKeyedHistogramById(id,
|
|
ProcessID(process),
|
|
/* instantiate = */ false);
|
|
if (!keyed || (aSkipEmpty && keyed->IsEmpty())) {
|
|
continue;
|
|
}
|
|
|
|
// Take a snapshot of the keyed histogram data!
|
|
KeyedHistogramSnapshotData snapshot;
|
|
if (!NS_SUCCEEDED(keyed->GetSnapshot(aLock, snapshot, aClearSubsession))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!hArray.emplaceBack(KeyedHistogramSnapshotInfo{std::move(snapshot), id})) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: thread-unsafe helpers for the external interface
|
|
|
|
namespace {
|
|
|
|
bool
|
|
internal_RemoteAccumulate(const StaticMutexAutoLock& aLock, HistogramID aId, uint32_t aSample)
|
|
{
|
|
if (XRE_IsParentProcess()) {
|
|
return false;
|
|
}
|
|
|
|
if (!internal_IsRecordingEnabled(aId)) {
|
|
return true;
|
|
}
|
|
|
|
TelemetryIPCAccumulator::AccumulateChildHistogram(aId, aSample);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_RemoteAccumulate(const StaticMutexAutoLock& aLock, HistogramID aId,
|
|
const nsCString& aKey, uint32_t aSample)
|
|
{
|
|
if (XRE_IsParentProcess()) {
|
|
return false;
|
|
}
|
|
|
|
if (!internal_IsRecordingEnabled(aId)) {
|
|
return true;
|
|
}
|
|
|
|
TelemetryIPCAccumulator::AccumulateChildKeyedHistogram(aId, aKey, aSample);
|
|
return true;
|
|
}
|
|
|
|
void internal_Accumulate(const StaticMutexAutoLock& aLock, HistogramID aId, uint32_t aSample)
|
|
{
|
|
if (!internal_CanRecordBase() ||
|
|
internal_RemoteAccumulate(aLock, aId, aSample)) {
|
|
return;
|
|
}
|
|
|
|
Histogram *h = internal_GetHistogramById(aLock, aId, ProcessID::Parent);
|
|
MOZ_ASSERT(h);
|
|
internal_HistogramAdd(aLock, *h, aId, aSample, ProcessID::Parent);
|
|
}
|
|
|
|
void
|
|
internal_Accumulate(const StaticMutexAutoLock& aLock, HistogramID aId,
|
|
const nsCString& aKey, uint32_t aSample)
|
|
{
|
|
if (!gInitDone || !internal_CanRecordBase() ||
|
|
internal_RemoteAccumulate(aLock, aId, aKey, aSample)) {
|
|
return;
|
|
}
|
|
|
|
KeyedHistogram* keyed = internal_GetKeyedHistogramById(aId, ProcessID::Parent);
|
|
MOZ_ASSERT(keyed);
|
|
keyed->Add(aKey, aSample, ProcessID::Parent);
|
|
}
|
|
|
|
void
|
|
internal_AccumulateChild(const StaticMutexAutoLock& aLock,
|
|
ProcessID aProcessType,
|
|
HistogramID aId,
|
|
uint32_t aSample)
|
|
{
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
|
|
if (Histogram* h = internal_GetHistogramById(aLock, aId, aProcessType)) {
|
|
internal_HistogramAdd(aLock, *h, aId, aSample, aProcessType);
|
|
} else {
|
|
NS_WARNING("Failed GetHistogramById for CHILD");
|
|
}
|
|
}
|
|
|
|
void
|
|
internal_AccumulateChildKeyed(const StaticMutexAutoLock& aLock, ProcessID aProcessType,
|
|
HistogramID aId, const nsCString& aKey, uint32_t aSample)
|
|
{
|
|
if (!gInitDone || !internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
|
|
KeyedHistogram* keyed = internal_GetKeyedHistogramById(aId, aProcessType);
|
|
MOZ_ASSERT(keyed);
|
|
keyed->Add(aKey, aSample, aProcessType);
|
|
}
|
|
|
|
void
|
|
internal_ClearHistogram(const StaticMutexAutoLock& aLock, HistogramID id)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
if (!XRE_IsParentProcess()) {
|
|
return;
|
|
}
|
|
|
|
// Handle keyed histograms.
|
|
if (gHistogramInfos[id].keyed) {
|
|
for (uint32_t process = 0; process < static_cast<uint32_t>(ProcessID::Count); ++process) {
|
|
KeyedHistogram* kh = internal_GetKeyedHistogramById(id, static_cast<ProcessID>(process), /* instantiate = */ false);
|
|
if (kh) {
|
|
kh->Clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now reset the histograms instances for all processes.
|
|
for (uint32_t process = 0; process < static_cast<uint32_t>(ProcessID::Count); ++process) {
|
|
internal_ClearHistogramById(aLock, id, static_cast<ProcessID>(process));
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: JSHistogram_* functions
|
|
|
|
// NOTE: the functions in this section:
|
|
//
|
|
// internal_JSHistogram_Add
|
|
// internal_JSHistogram_Snapshot
|
|
// internal_JSHistogram_Clear
|
|
// internal_WrapAndReturnHistogram
|
|
//
|
|
// all run without protection from |gTelemetryHistogramMutex|. If they
|
|
// held |gTelemetryHistogramMutex|, there would be the possibility of
|
|
// deadlock because the JS_ calls that they make may call back into the
|
|
// TelemetryHistogram interface, hence trying to re-acquire the mutex.
|
|
//
|
|
// This means that these functions potentially race against threads, but
|
|
// that seems preferable to risking deadlock.
|
|
|
|
namespace {
|
|
|
|
void internal_JSHistogram_finalize(JSFreeOp*, JSObject*);
|
|
|
|
static const JSClassOps sJSHistogramClassOps = {
|
|
nullptr, /* addProperty */
|
|
nullptr, /* delProperty */
|
|
nullptr, /* enumerate */
|
|
nullptr, /* newEnumerate */
|
|
nullptr, /* resolve */
|
|
nullptr, /* mayResolve */
|
|
internal_JSHistogram_finalize
|
|
};
|
|
|
|
static const JSClass sJSHistogramClass = {
|
|
"JSHistogram", /* name */
|
|
JSCLASS_HAS_PRIVATE | JSCLASS_FOREGROUND_FINALIZE, /* flags */
|
|
&sJSHistogramClassOps
|
|
};
|
|
|
|
struct JSHistogramData {
|
|
HistogramID histogramId;
|
|
};
|
|
|
|
bool
|
|
internal_JSHistogram_CoerceValue(JSContext* aCx, JS::Handle<JS::Value> aElement, HistogramID aId,
|
|
uint32_t aHistogramType, uint32_t& aValue)
|
|
{
|
|
if (aElement.isString()) {
|
|
// Strings only allowed for categorical histograms
|
|
if (aHistogramType != nsITelemetry::HISTOGRAM_CATEGORICAL) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag,
|
|
NS_LITERAL_STRING("String argument only allowed for categorical histogram"));
|
|
return false;
|
|
}
|
|
|
|
// Label is given by the string argument
|
|
nsAutoJSString label;
|
|
if (!label.init(aCx, aElement)) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Invalid string parameter"));
|
|
return false;
|
|
}
|
|
|
|
// Get the label id for accumulation
|
|
nsresult rv = gHistogramInfos[aId].label_id(NS_ConvertUTF16toUTF8(label).get(), &aValue);
|
|
if (NS_FAILED(rv)) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Invalid string label"));
|
|
return false;
|
|
}
|
|
} else if ( !(aElement.isNumber() || aElement.isBoolean()) ) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Argument not a number"));
|
|
return false;
|
|
} else if ( aElement.isNumber() && aElement.toNumber() > UINT32_MAX ) {
|
|
// Clamp large numerical arguments to aValue's acceptable values.
|
|
// JS::ToUint32 will take aElement modulo 2^32 before returning it, which
|
|
// may result in a smaller final value.
|
|
aValue = UINT32_MAX;
|
|
#ifdef DEBUG
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Clamped large numeric value"));
|
|
#endif
|
|
} else if (!JS::ToUint32(aCx, aElement, &aValue)) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Failed to convert element to UInt32"));
|
|
return false;
|
|
}
|
|
|
|
// If we're here then all type checks have passed and aValue contains the coerced integer
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSHistogram_GetValueArray(JSContext* aCx, JS::CallArgs& args, uint32_t aHistogramType, HistogramID aId,
|
|
bool isKeyed, nsTArray<uint32_t>& aArray)
|
|
{
|
|
// This function populates aArray with the values extracted from args. Handles keyed and non-keyed histograms,
|
|
// and single and array of values. Also performs sanity checks on the arguments.
|
|
// Returns true upon successful population, false otherwise.
|
|
|
|
uint32_t firstArgIndex = 0;
|
|
if (isKeyed) {
|
|
firstArgIndex = 1;
|
|
}
|
|
|
|
// Special case of no argument (or only key) and count histogram
|
|
if (args.length() == firstArgIndex) {
|
|
if (!(aHistogramType == nsITelemetry::HISTOGRAM_COUNT)) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag,
|
|
NS_LITERAL_STRING("Need at least one argument for non count type histogram"));
|
|
return false;
|
|
}
|
|
|
|
aArray.AppendElement(1);
|
|
return true;
|
|
}
|
|
|
|
if (args[firstArgIndex].isObject() && !args[firstArgIndex].isString()) {
|
|
JS::Rooted<JSObject*> arrayObj(aCx, &args[firstArgIndex].toObject());
|
|
|
|
bool isArray = false;
|
|
JS_IsArrayObject(aCx, arrayObj, &isArray);
|
|
|
|
if (!isArray) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("The argument to accumulate can't be a non-array object"));
|
|
return false;
|
|
}
|
|
|
|
uint32_t arrayLength = 0;
|
|
if (!JS_GetArrayLength(aCx, arrayObj, &arrayLength)) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Failed while trying to get array length"));
|
|
return false;
|
|
}
|
|
|
|
for (uint32_t arrayIdx = 0; arrayIdx < arrayLength; arrayIdx++) {
|
|
JS::Rooted<JS::Value> element(aCx);
|
|
|
|
if (!JS_GetElement(aCx, arrayObj, arrayIdx, &element)) {
|
|
nsPrintfCString msg("Failed while trying to get element at index %d", arrayIdx);
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_ConvertUTF8toUTF16(msg));
|
|
return false;
|
|
}
|
|
|
|
uint32_t value = 0;
|
|
if (!internal_JSHistogram_CoerceValue(aCx, element, aId, aHistogramType, value)) {
|
|
nsPrintfCString msg("Element at index %d failed type checks", arrayIdx);
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_ConvertUTF8toUTF16(msg));
|
|
return false;
|
|
}
|
|
aArray.AppendElement(value);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
uint32_t value = 0;
|
|
if (!internal_JSHistogram_CoerceValue(aCx, args[firstArgIndex], aId, aHistogramType, value)) {
|
|
return false;
|
|
}
|
|
aArray.AppendElement(value);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSHistogram_Add(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject* obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
uint32_t type = gHistogramInfos[id].histogramType;
|
|
|
|
|
|
// This function should always return |undefined| and never fail but
|
|
// rather report failures using the console.
|
|
args.rval().setUndefined();
|
|
|
|
nsTArray<uint32_t> values;
|
|
if (!internal_JSHistogram_GetValueArray(cx, args, type, id, false, values)) {
|
|
// Either GetValueArray or CoerceValue utility function will have printed a meaningful
|
|
// error message, so we simply return true
|
|
return true;
|
|
}
|
|
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
for (uint32_t aValue: values) {
|
|
internal_Accumulate(locker, id, aValue);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSHistogram_Snapshot(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject* obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
|
|
HistogramSnapshotData dataSnapshot;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
|
|
// This is not good standard behavior given that we have histogram instances
|
|
// covering multiple processes.
|
|
// However, changing this requires some broader changes to callers.
|
|
Histogram* h = internal_GetHistogramById(locker, id, ProcessID::Parent);
|
|
// Take a snapshot of the data here, protected by the lock, and then,
|
|
// outside of the lock protection, mirror it to a JS structure
|
|
if (NS_FAILED(internal_GetHistogramAndSamples(locker, h, dataSnapshot))) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
JS::Rooted<JSObject*> snapshot(cx, JS_NewPlainObject(cx));
|
|
if (!snapshot) {
|
|
return false;
|
|
}
|
|
|
|
if (NS_FAILED(internal_ReflectHistogramAndSamples(cx,
|
|
snapshot,
|
|
gHistogramInfos[id],
|
|
dataSnapshot))) {
|
|
return false;
|
|
}
|
|
|
|
args.rval().setObject(*snapshot);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSHistogram_Clear(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject* obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
|
|
// This function should always return |undefined| and never fail but
|
|
// rather report failures using the console.
|
|
args.rval().setUndefined();
|
|
|
|
HistogramID id = data->histogramId;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
internal_ClearHistogram(locker, id);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// NOTE: Runs without protection from |gTelemetryHistogramMutex|.
|
|
// See comment at the top of this section.
|
|
nsresult
|
|
internal_WrapAndReturnHistogram(HistogramID id, JSContext *cx,
|
|
JS::MutableHandle<JS::Value> ret)
|
|
{
|
|
JS::Rooted<JSObject*> obj(cx, JS_NewObject(cx, &sJSHistogramClass));
|
|
if (!obj) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// The 3 functions that are wrapped up here are eventually called
|
|
// by the same thread that runs this function.
|
|
if (!(JS_DefineFunction(cx, obj, "add", internal_JSHistogram_Add, 1, 0)
|
|
&& JS_DefineFunction(cx, obj, "snapshot",
|
|
internal_JSHistogram_Snapshot, 0, 0)
|
|
&& JS_DefineFunction(cx, obj, "clear", internal_JSHistogram_Clear, 0, 0))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSHistogramData* data = new JSHistogramData{id};
|
|
JS_SetPrivate(obj, data);
|
|
ret.setObject(*obj);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
internal_JSHistogram_finalize(JSFreeOp*, JSObject* obj)
|
|
{
|
|
if (!obj ||
|
|
JS_GetClass(obj) != &sJSHistogramClass) {
|
|
MOZ_ASSERT_UNREACHABLE("Should have the right JS class.");
|
|
return;
|
|
}
|
|
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
delete data;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: JSKeyedHistogram_* functions
|
|
|
|
// NOTE: the functions in this section:
|
|
//
|
|
// internal_KeyedHistogram_SnapshotImpl
|
|
// internal_JSKeyedHistogram_Add
|
|
// internal_JSKeyedHistogram_Keys
|
|
// internal_JSKeyedHistogram_Snapshot
|
|
// internal_JSKeyedHistogram_Clear
|
|
// internal_WrapAndReturnKeyedHistogram
|
|
//
|
|
// Same comments as above, at the JSHistogram_* section, regarding
|
|
// deadlock avoidance, apply.
|
|
|
|
namespace {
|
|
|
|
void internal_JSKeyedHistogram_finalize(JSFreeOp*, JSObject*);
|
|
|
|
static const JSClassOps sJSKeyedHistogramClassOps = {
|
|
nullptr, /* addProperty */
|
|
nullptr, /* delProperty */
|
|
nullptr, /* enumerate */
|
|
nullptr, /* newEnumerate */
|
|
nullptr, /* resolve */
|
|
nullptr, /* mayResolve */
|
|
internal_JSKeyedHistogram_finalize
|
|
};
|
|
|
|
static const JSClass sJSKeyedHistogramClass = {
|
|
"JSKeyedHistogram", /* name */
|
|
JSCLASS_HAS_PRIVATE | JSCLASS_FOREGROUND_FINALIZE, /* flags */
|
|
&sJSKeyedHistogramClassOps
|
|
};
|
|
|
|
bool
|
|
internal_KeyedHistogram_SnapshotImpl(JSContext *cx, unsigned argc,
|
|
JS::Value *vp,
|
|
bool clearSubsession)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSKeyedHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSKeyedHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject *obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
|
|
// This function should always return |undefined| and never fail but
|
|
// rather report failures using the console.
|
|
args.rval().setUndefined();
|
|
|
|
// This is not good standard behavior given that we have histogram instances
|
|
// covering multiple processes.
|
|
// However, changing this requires some broader changes to callers.
|
|
KeyedHistogram* keyed = internal_GetKeyedHistogramById(id, ProcessID::Parent, /* instantiate = */ true);
|
|
if (!keyed) {
|
|
JS_ReportErrorASCII(cx, "Failed to look up keyed histogram");
|
|
return false;
|
|
}
|
|
|
|
// No argument was passed, so snapshot all the keys.
|
|
if (args.length() == 0) {
|
|
JS::RootedObject snapshot(cx, JS_NewPlainObject(cx));
|
|
if (!snapshot) {
|
|
JS_ReportErrorASCII(cx, "Failed to create object");
|
|
return false;
|
|
}
|
|
|
|
if (!NS_SUCCEEDED(keyed->GetJSSnapshot(cx, snapshot, clearSubsession))) {
|
|
JS_ReportErrorASCII(cx, "Failed to reflect keyed histograms");
|
|
return false;
|
|
}
|
|
|
|
args.rval().setObject(*snapshot);
|
|
return true;
|
|
}
|
|
|
|
// One argument was passed. If it's a string, use it as a key
|
|
// and just snapshot the data for that key.
|
|
nsAutoJSString key;
|
|
if (!args[0].isString() || !key.init(cx, args[0])) {
|
|
JS_ReportErrorASCII(cx, "Not a string");
|
|
return false;
|
|
}
|
|
|
|
HistogramSnapshotData dataSnapshot;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
// Get data for the key we're looking for.
|
|
Histogram* h = nullptr;
|
|
nsresult rv = keyed->GetHistogram(NS_ConvertUTF16toUTF8(key), &h);
|
|
if (NS_FAILED(rv)) {
|
|
return false;
|
|
}
|
|
|
|
// Take a snapshot of the data here, protected by the lock, and then,
|
|
// outside of the lock protection, mirror it to a JS structure
|
|
if (NS_FAILED(internal_GetHistogramAndSamples(locker, h, dataSnapshot))) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
JS::RootedObject snapshot(cx, JS_NewPlainObject(cx));
|
|
if (!snapshot) {
|
|
return false;
|
|
}
|
|
|
|
if (NS_FAILED(internal_ReflectHistogramAndSamples(cx,
|
|
snapshot,
|
|
gHistogramInfos[id],
|
|
dataSnapshot))) {
|
|
JS_ReportErrorASCII(cx, "Failed to reflect histogram");
|
|
return false;
|
|
}
|
|
|
|
args.rval().setObject(*snapshot);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSKeyedHistogram_Add(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSKeyedHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSKeyedHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject *obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
|
|
// This function should always return |undefined| and never fail but
|
|
// rather report failures using the console.
|
|
args.rval().setUndefined();
|
|
if (args.length() < 1) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Expected one argument"));
|
|
return true;
|
|
}
|
|
|
|
nsAutoJSString key;
|
|
if (!args[0].isString() || !key.init(cx, args[0])) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_LITERAL_STRING("Not a string"));
|
|
return true;
|
|
}
|
|
|
|
// Check if we're allowed to record in the provided key, for this histogram.
|
|
if (!gHistogramInfos[id].allows_key(NS_ConvertUTF16toUTF8(key))) {
|
|
nsPrintfCString msg("%s - key '%s' not allowed for this keyed histogram",
|
|
gHistogramInfos[id].name(),
|
|
NS_ConvertUTF16toUTF8(key).get());
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_ConvertUTF8toUTF16(msg));
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_UNKNOWN_HISTOGRAM_KEYS,
|
|
NS_ConvertASCIItoUTF16(gHistogramInfos[id].name()), 1);
|
|
return true;
|
|
}
|
|
|
|
const uint32_t type = gHistogramInfos[id].histogramType;
|
|
|
|
nsTArray<uint32_t> values;
|
|
if (!internal_JSHistogram_GetValueArray(cx, args, type, id, true, values)) {
|
|
// Either GetValueArray or CoerceValue utility function will have printed a meaningful
|
|
// error message so we simple return true
|
|
return true;
|
|
}
|
|
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
for (uint32_t aValue: values) {
|
|
internal_Accumulate(locker, id, NS_ConvertUTF16toUTF8(key), aValue);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
internal_JSKeyedHistogram_Keys(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSKeyedHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSKeyedHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject *obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
|
|
KeyedHistogram* keyed = nullptr;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
|
|
// This is not good standard behavior given that we have histogram instances
|
|
// covering multiple processes.
|
|
// However, changing this requires some broader changes to callers.
|
|
keyed = internal_GetKeyedHistogramById(id, ProcessID::Parent);
|
|
}
|
|
|
|
MOZ_ASSERT(keyed);
|
|
if (!keyed) {
|
|
return false;
|
|
}
|
|
|
|
return NS_SUCCEEDED(keyed->GetJSKeys(cx, args));
|
|
}
|
|
|
|
bool
|
|
internal_JSKeyedHistogram_Snapshot(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
return internal_KeyedHistogram_SnapshotImpl(cx, argc, vp, false);
|
|
}
|
|
|
|
bool
|
|
internal_JSKeyedHistogram_Clear(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
|
|
if (!args.thisv().isObject() ||
|
|
JS_GetClass(&args.thisv().toObject()) != &sJSKeyedHistogramClass) {
|
|
JS_ReportErrorASCII(cx, "Wrong JS class, expected JSKeyedHistogram class");
|
|
return false;
|
|
}
|
|
|
|
JSObject *obj = &args.thisv().toObject();
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
HistogramID id = data->histogramId;
|
|
|
|
// This function should always return |undefined| and never fail but
|
|
// rather report failures using the console.
|
|
args.rval().setUndefined();
|
|
|
|
KeyedHistogram* keyed = nullptr;
|
|
{
|
|
MOZ_ASSERT(internal_IsHistogramEnumId(id));
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
// This is not good standard behavior given that we have histogram instances
|
|
// covering multiple processes.
|
|
// However, changing this requires some broader changes to callers.
|
|
keyed = internal_GetKeyedHistogramById(id, ProcessID::Parent, /* instantiate = */ false);
|
|
|
|
if (!keyed) {
|
|
return true;
|
|
}
|
|
|
|
keyed->Clear();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// NOTE: Runs without protection from |gTelemetryHistogramMutex|.
|
|
// See comment at the top of this section.
|
|
nsresult
|
|
internal_WrapAndReturnKeyedHistogram(HistogramID id, JSContext *cx,
|
|
JS::MutableHandle<JS::Value> ret)
|
|
{
|
|
JS::Rooted<JSObject*> obj(cx, JS_NewObject(cx, &sJSKeyedHistogramClass));
|
|
if (!obj)
|
|
return NS_ERROR_FAILURE;
|
|
// The 6 functions that are wrapped up here are eventually called
|
|
// by the same thread that runs this function.
|
|
if (!(JS_DefineFunction(cx, obj, "add", internal_JSKeyedHistogram_Add, 2, 0)
|
|
&& JS_DefineFunction(cx, obj, "snapshot",
|
|
internal_JSKeyedHistogram_Snapshot, 1, 0)
|
|
&& JS_DefineFunction(cx, obj, "keys",
|
|
internal_JSKeyedHistogram_Keys, 0, 0)
|
|
&& JS_DefineFunction(cx, obj, "clear",
|
|
internal_JSKeyedHistogram_Clear, 0, 0))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSHistogramData* data = new JSHistogramData{id};
|
|
JS_SetPrivate(obj, data);
|
|
ret.setObject(*obj);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
internal_JSKeyedHistogram_finalize(JSFreeOp*, JSObject* obj)
|
|
{
|
|
if (!obj ||
|
|
JS_GetClass(obj) != &sJSKeyedHistogramClass) {
|
|
MOZ_ASSERT_UNREACHABLE("Should have the right JS class.");
|
|
return;
|
|
}
|
|
|
|
JSHistogramData* data = static_cast<JSHistogramData*>(JS_GetPrivate(obj));
|
|
MOZ_ASSERT(data);
|
|
delete data;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// EXTERNALLY VISIBLE FUNCTIONS in namespace TelemetryHistogram::
|
|
|
|
// All of these functions are actually in namespace TelemetryHistogram::,
|
|
// but the ::TelemetryHistogram prefix is given explicitly. This is
|
|
// because it is critical to see which calls from these functions are
|
|
// to another function in this interface. Mis-identifying "inwards
|
|
// calls" from "calls to another function in this interface" will lead
|
|
// to deadlocking and/or races. See comments at the top of the file
|
|
// for further (important!) details.
|
|
|
|
void TelemetryHistogram::InitializeGlobalState(bool canRecordBase,
|
|
bool canRecordExtended)
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
MOZ_ASSERT(!gInitDone, "TelemetryHistogram::InitializeGlobalState "
|
|
"may only be called once");
|
|
|
|
gCanRecordBase = canRecordBase;
|
|
gCanRecordExtended = canRecordExtended;
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
gHistogramStorage =
|
|
new Histogram*[HistogramCount * size_t(ProcessID::Count)] {};
|
|
gKeyedHistogramStorage =
|
|
new KeyedHistogram*[HistogramCount * size_t(ProcessID::Count)] {};
|
|
}
|
|
|
|
// gNameToHistogramIDMap should have been pre-sized correctly at the
|
|
// declaration point further up in this file.
|
|
|
|
// Populate the static histogram name->id cache.
|
|
// Note that the histogram names come from a static table so we can wrap them
|
|
// in a literal string to avoid allocations when it gets copied.
|
|
for (uint32_t i = 0; i < HistogramCount; i++) {
|
|
auto name = gHistogramInfos[i].name();
|
|
|
|
// Make sure the name pointer is in a valid region. See bug 1428612.
|
|
MOZ_DIAGNOSTIC_ASSERT(name >= gHistogramStringTable);
|
|
MOZ_DIAGNOSTIC_ASSERT(
|
|
uintptr_t(name) < (uintptr_t(gHistogramStringTable) + sizeof(gHistogramStringTable)));
|
|
|
|
nsCString wrappedName;
|
|
wrappedName.AssignLiteral(name, strlen(name));
|
|
gNameToHistogramIDMap.Put(wrappedName, HistogramID(i));
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
gNameToHistogramIDMap.MarkImmutable();
|
|
#endif
|
|
|
|
// Some Telemetry histograms depend on the value of C++ constants and hardcode
|
|
// their values in Histograms.json.
|
|
// We add static asserts here for those values to match so that future changes
|
|
// don't go unnoticed.
|
|
static_assert((JS::gcreason::NUM_TELEMETRY_REASONS + 1) ==
|
|
gHistogramInfos[mozilla::Telemetry::GC_MINOR_REASON].bucketCount &&
|
|
(JS::gcreason::NUM_TELEMETRY_REASONS + 1) ==
|
|
gHistogramInfos[mozilla::Telemetry::GC_MINOR_REASON_LONG].bucketCount &&
|
|
(JS::gcreason::NUM_TELEMETRY_REASONS + 1) ==
|
|
gHistogramInfos[mozilla::Telemetry::GC_REASON_2].bucketCount,
|
|
"NUM_TELEMETRY_REASONS is assumed to be a fixed value in Histograms.json."
|
|
" If this was an intentional change, update the n_values for the "
|
|
"following in Histograms.json: GC_MINOR_REASON, GC_MINOR_REASON_LONG, "
|
|
"GC_REASON_2");
|
|
|
|
static_assert((mozilla::StartupTimeline::MAX_EVENT_ID + 1) ==
|
|
gHistogramInfos[mozilla::Telemetry::STARTUP_MEASUREMENT_ERRORS].bucketCount,
|
|
"MAX_EVENT_ID is assumed to be a fixed value in Histograms.json. If this"
|
|
" was an intentional change, update the n_values for the following in "
|
|
"Histograms.json: STARTUP_MEASUREMENT_ERRORS");
|
|
|
|
gInitDone = true;
|
|
}
|
|
|
|
void TelemetryHistogram::DeInitializeGlobalState()
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
gCanRecordBase = false;
|
|
gCanRecordExtended = false;
|
|
gNameToHistogramIDMap.Clear();
|
|
gInitDone = false;
|
|
|
|
// FactoryGet `new`s Histograms for us, but requires us to manually delete.
|
|
if (XRE_IsParentProcess()) {
|
|
for (size_t i = 0; i < HistogramCount * size_t(ProcessID::Count); ++i) {
|
|
if (i < HistogramCount * size_t(ProcessID::Count)) {
|
|
delete gKeyedHistogramStorage[i];
|
|
}
|
|
if (gHistogramStorage[i] != gExpiredHistogram) {
|
|
delete gHistogramStorage[i];
|
|
}
|
|
}
|
|
delete[] gHistogramStorage;
|
|
delete[] gKeyedHistogramStorage;
|
|
}
|
|
delete gExpiredHistogram;
|
|
gExpiredHistogram = nullptr;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
bool TelemetryHistogram::GlobalStateHasBeenInitialized() {
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
return gInitDone;
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
TelemetryHistogram::CanRecordBase() {
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
return internal_CanRecordBase();
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::SetCanRecordBase(bool b) {
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
gCanRecordBase = b;
|
|
}
|
|
|
|
bool
|
|
TelemetryHistogram::CanRecordExtended() {
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
return internal_CanRecordExtended();
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::SetCanRecordExtended(bool b) {
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
gCanRecordExtended = b;
|
|
}
|
|
|
|
|
|
void
|
|
TelemetryHistogram::InitHistogramRecordingEnabled()
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
auto processType = XRE_GetProcessType();
|
|
for (size_t i = 0; i < HistogramCount; ++i) {
|
|
const HistogramInfo& h = gHistogramInfos[i];
|
|
mozilla::Telemetry::HistogramID id = mozilla::Telemetry::HistogramID(i);
|
|
bool canRecordInProcess = CanRecordInProcess(h.record_in_processes, processType);
|
|
bool canRecordProduct = CanRecordProduct(h.products);
|
|
internal_SetHistogramRecordingEnabled(locker, id, canRecordInProcess && canRecordProduct);
|
|
}
|
|
|
|
for (auto recordingInitiallyDisabledID : kRecordingInitiallyDisabledIDs) {
|
|
internal_SetHistogramRecordingEnabled(locker,
|
|
recordingInitiallyDisabledID,
|
|
false);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::SetHistogramRecordingEnabled(HistogramID aID,
|
|
bool aEnabled)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aID))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
const HistogramInfo& h = gHistogramInfos[aID];
|
|
if (!CanRecordInProcess(h.record_in_processes, XRE_GetProcessType())) {
|
|
// Don't permit record_in_process-disabled recording to be re-enabled.
|
|
return;
|
|
}
|
|
|
|
if (!CanRecordProduct(h.products)) {
|
|
// Don't permit products-disabled recording to be re-enabled.
|
|
return;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
internal_SetHistogramRecordingEnabled(locker, aID, aEnabled);
|
|
}
|
|
|
|
|
|
nsresult
|
|
TelemetryHistogram::SetHistogramRecordingEnabled(const nsACString& name,
|
|
bool aEnabled)
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
HistogramID id;
|
|
if (NS_FAILED(internal_GetHistogramIdByName(locker, name, &id))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
const HistogramInfo& hi = gHistogramInfos[id];
|
|
if (CanRecordInProcess(hi.record_in_processes, XRE_GetProcessType())) {
|
|
internal_SetHistogramRecordingEnabled(locker, id, aEnabled);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(HistogramID aID,
|
|
uint32_t aSample)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aID))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
internal_Accumulate(locker, aID, aSample);
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(HistogramID aID, const nsTArray<uint32_t>& aSamples)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aID))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(!gHistogramInfos[aID].keyed, "Cannot accumulate into a keyed histogram. No key given.");
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
for(uint32_t sample: aSamples){
|
|
internal_Accumulate(locker, aID, sample);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(HistogramID aID,
|
|
const nsCString& aKey, uint32_t aSample)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aID))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
// Check if we're allowed to record in the provided key, for this histogram.
|
|
if (!gHistogramInfos[aID].allows_key(aKey)) {
|
|
nsPrintfCString msg("%s - key '%s' not allowed for this keyed histogram",
|
|
gHistogramInfos[aID].name(),
|
|
aKey.get());
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_ConvertUTF8toUTF16(msg));
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_UNKNOWN_HISTOGRAM_KEYS,
|
|
NS_ConvertASCIItoUTF16(gHistogramInfos[aID].name()), 1);
|
|
return;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
internal_Accumulate(locker, aID, aKey, aSample);
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(HistogramID aID, const nsCString& aKey,
|
|
const nsTArray<uint32_t>& aSamples)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aID))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids");
|
|
return;
|
|
}
|
|
|
|
// Check that this histogram is keyed
|
|
MOZ_ASSERT(gHistogramInfos[aID].keyed, "Cannot accumulate into a non-keyed histogram using a key.");
|
|
|
|
// Check if we're allowed to record in the provided key, for this histogram.
|
|
if (!gHistogramInfos[aID].allows_key(aKey)) {
|
|
nsPrintfCString msg("%s - key '%s' not allowed for this keyed histogram",
|
|
gHistogramInfos[aID].name(),
|
|
aKey.get());
|
|
LogToBrowserConsole(nsIScriptError::errorFlag, NS_ConvertUTF8toUTF16(msg));
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_UNKNOWN_HISTOGRAM_KEYS,
|
|
NS_ConvertASCIItoUTF16(gHistogramInfos[aID].name()), 1);
|
|
return;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
for(uint32_t sample: aSamples){
|
|
internal_Accumulate(locker, aID, aKey, sample);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(const char* name, uint32_t sample)
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
HistogramID id;
|
|
nsresult rv = internal_GetHistogramIdByName(locker, nsDependentCString(name), &id);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
internal_Accumulate(locker, id, sample);
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::Accumulate(const char* name,
|
|
const nsCString& key, uint32_t sample)
|
|
{
|
|
bool keyNotAllowed = false;
|
|
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
HistogramID id;
|
|
nsresult rv = internal_GetHistogramIdByName(locker, nsDependentCString(name), &id);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Check if we're allowed to record in the provided key, for this histogram.
|
|
if (gHistogramInfos[id].allows_key(key)) {
|
|
internal_Accumulate(locker, id, key, sample);
|
|
return;
|
|
}
|
|
// We're holding |gTelemetryHistogramMutex|, so we can't print a message
|
|
// here.
|
|
keyNotAllowed = true;
|
|
}
|
|
}
|
|
|
|
if (keyNotAllowed) {
|
|
LogToBrowserConsole(nsIScriptError::errorFlag,
|
|
NS_LITERAL_STRING("Key not allowed for this keyed histogram"));
|
|
TelemetryScalar::Add(
|
|
mozilla::Telemetry::ScalarID::TELEMETRY_ACCUMULATE_UNKNOWN_HISTOGRAM_KEYS,
|
|
NS_ConvertASCIItoUTF16(name), 1);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::AccumulateCategorical(HistogramID aId,
|
|
const nsCString& label)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aId))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
uint32_t labelId = 0;
|
|
if (NS_FAILED(gHistogramInfos[aId].label_id(label.get(), &labelId))) {
|
|
return;
|
|
}
|
|
internal_Accumulate(locker, aId, labelId);
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::AccumulateCategorical(HistogramID aId, const nsTArray<nsCString>& aLabels)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aId))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return;
|
|
}
|
|
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
|
|
// We use two loops, one for getting label_ids and another one for actually accumulating
|
|
// the values. This ensures that in the case of an invalid label in the array, no values
|
|
// are accumulated. In any call to this API, either all or (in case of error) none of the
|
|
// values will be accumulated.
|
|
|
|
nsTArray<uint32_t> intSamples(aLabels.Length());
|
|
for (const nsCString& label: aLabels){
|
|
uint32_t labelId = 0;
|
|
if (NS_FAILED(gHistogramInfos[aId].label_id(label.get(), &labelId))) {
|
|
return;
|
|
}
|
|
intSamples.AppendElement(labelId);
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
for (uint32_t sample: intSamples){
|
|
internal_Accumulate(locker, aId, sample);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::AccumulateChild(ProcessID aProcessType,
|
|
const nsTArray<HistogramAccumulation>& aAccumulations)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
for (uint32_t i = 0; i < aAccumulations.Length(); ++i) {
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aAccumulations[i].mId))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
continue;
|
|
}
|
|
internal_AccumulateChild(locker,
|
|
aProcessType,
|
|
aAccumulations[i].mId,
|
|
aAccumulations[i].mSample);
|
|
}
|
|
}
|
|
|
|
void
|
|
TelemetryHistogram::AccumulateChildKeyed(ProcessID aProcessType,
|
|
const nsTArray<KeyedHistogramAccumulation>& aAccumulations)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
if (!internal_CanRecordBase()) {
|
|
return;
|
|
}
|
|
for (uint32_t i = 0; i < aAccumulations.Length(); ++i) {
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(aAccumulations[i].mId))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
continue;
|
|
}
|
|
internal_AccumulateChildKeyed(locker,
|
|
aProcessType,
|
|
aAccumulations[i].mId,
|
|
aAccumulations[i].mKey,
|
|
aAccumulations[i].mSample);
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::GetHistogramById(const nsACString &name, JSContext *cx,
|
|
JS::MutableHandle<JS::Value> ret)
|
|
{
|
|
HistogramID id;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
nsresult rv = internal_GetHistogramIdByName(locker, name, &id);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (gHistogramInfos[id].keyed) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
// Runs without protection from |gTelemetryHistogramMutex|
|
|
return internal_WrapAndReturnHistogram(id, cx, ret);
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::GetKeyedHistogramById(const nsACString &name,
|
|
JSContext *cx,
|
|
JS::MutableHandle<JS::Value> ret)
|
|
{
|
|
HistogramID id;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
nsresult rv = internal_GetHistogramIdByName(locker, name, &id);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!gHistogramInfos[id].keyed) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
// Runs without protection from |gTelemetryHistogramMutex|
|
|
return internal_WrapAndReturnKeyedHistogram(id, cx, ret);
|
|
}
|
|
|
|
const char*
|
|
TelemetryHistogram::GetHistogramName(HistogramID id)
|
|
{
|
|
if (NS_WARN_IF(!internal_IsHistogramEnumId(id))) {
|
|
MOZ_ASSERT_UNREACHABLE("Histogram usage requires valid ids.");
|
|
return nullptr;
|
|
}
|
|
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
const HistogramInfo& h = gHistogramInfos[id];
|
|
return h.name();
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::CreateHistogramSnapshots(JSContext* aCx,
|
|
JS::MutableHandleValue aResult,
|
|
unsigned int aDataset,
|
|
bool aClearSubsession)
|
|
{
|
|
// Runs without protection from |gTelemetryHistogramMutex|
|
|
JS::Rooted<JSObject*> root_obj(aCx, JS_NewPlainObject(aCx));
|
|
if (!root_obj) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
aResult.setObject(*root_obj);
|
|
|
|
// Include the GPU process in histogram snapshots only if we actually tried
|
|
// to launch a process for it.
|
|
bool includeGPUProcess = internal_AttemptedGPUProcess();
|
|
|
|
HistogramProcessSnapshotsArray processHistArray;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
nsresult rv = internal_GetHistogramsSnapshot(locker,
|
|
aDataset,
|
|
aClearSubsession,
|
|
includeGPUProcess,
|
|
processHistArray);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Make the JS calls on the stashed histograms for every process
|
|
for (uint32_t process = 0; process < processHistArray.length(); ++process) {
|
|
JS::Rooted<JSObject*> processObject(aCx, JS_NewPlainObject(aCx));
|
|
if (!processObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
if (!JS_DefineProperty(aCx, root_obj,
|
|
GetNameForProcessID(ProcessID(process)),
|
|
processObject, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
for (const HistogramSnapshotInfo& hData : processHistArray[process]) {
|
|
HistogramID id = hData.histogramID;
|
|
|
|
JS::Rooted<JSObject*> hobj(aCx, JS_NewPlainObject(aCx));
|
|
if (!hobj) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (NS_FAILED(internal_ReflectHistogramAndSamples(aCx,
|
|
hobj,
|
|
gHistogramInfos[id],
|
|
hData.data))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!JS_DefineProperty(aCx, processObject, gHistogramInfos[id].name(),
|
|
hobj, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::GetKeyedHistogramSnapshots(JSContext* aCx,
|
|
JS::MutableHandleValue aResult,
|
|
unsigned int aDataset,
|
|
bool aClearSubsession)
|
|
{
|
|
// Runs without protection from |gTelemetryHistogramMutex|
|
|
JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
|
|
if (!obj) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
aResult.setObject(*obj);
|
|
|
|
// Include the GPU process in histogram snapshots only if we actually tried
|
|
// to launch a process for it.
|
|
bool includeGPUProcess = internal_AttemptedGPUProcess();
|
|
|
|
// Get a snapshot of all the data while holding the mutex.
|
|
KeyedHistogramProcessSnapshotsArray processHistArray;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
nsresult rv = internal_GetKeyedHistogramsSnapshot(locker,
|
|
aDataset,
|
|
aClearSubsession,
|
|
includeGPUProcess,
|
|
processHistArray);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Mirror the snapshot data to JS, now that we released the mutex.
|
|
for (uint32_t process = 0; process < processHistArray.length(); ++process) {
|
|
JS::Rooted<JSObject*> processObject(aCx, JS_NewPlainObject(aCx));
|
|
if (!processObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
if (!JS_DefineProperty(aCx, obj, GetNameForProcessID(ProcessID(process)),
|
|
processObject, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
for (const KeyedHistogramSnapshotInfo& hData : processHistArray[process]) {
|
|
const HistogramInfo& info = gHistogramInfos[hData.histogramId];
|
|
|
|
JS::RootedObject snapshot(aCx, JS_NewPlainObject(aCx));
|
|
if (!snapshot) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!NS_SUCCEEDED(internal_ReflectKeyedHistogram(hData.data, info, aCx, snapshot))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!JS_DefineProperty(aCx, processObject, info.name(),
|
|
snapshot, JSPROP_ENUMERATE)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
size_t
|
|
TelemetryHistogram::GetMapShallowSizesOfExcludingThis(mozilla::MallocSizeOf
|
|
aMallocSizeOf)
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
return gNameToHistogramIDMap.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
size_t
|
|
TelemetryHistogram::GetHistogramSizesofIncludingThis(mozilla::MallocSizeOf
|
|
aMallocSizeOf)
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
// TODO
|
|
return 0;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PRIVATE: GeckoView specific helpers
|
|
|
|
namespace base {
|
|
class PersistedSampleSet : public Histogram::SampleSet
|
|
{
|
|
public:
|
|
explicit PersistedSampleSet(const nsTArray<Histogram::Count>& aCounts,
|
|
int64_t aSampleSum);
|
|
};
|
|
|
|
PersistedSampleSet::PersistedSampleSet(const nsTArray<Histogram::Count>& aCounts,
|
|
int64_t aSampleSum)
|
|
{
|
|
// Initialize the data in the base class. See Histogram::SampleSet
|
|
// for the fields documentation.
|
|
const size_t numCounts = aCounts.Length();
|
|
counts_.SetLength(numCounts);
|
|
|
|
for (size_t i = 0; i < numCounts; i++) {
|
|
counts_[i] = aCounts[i];
|
|
redundant_count_ += aCounts[i];
|
|
}
|
|
sum_ = aSampleSum;
|
|
};
|
|
} // base (from ipc/chromium/src/base)
|
|
|
|
namespace {
|
|
/**
|
|
* Helper function to write histogram properties to JSON.
|
|
* Please note that this needs to be called between
|
|
* StartObjectProperty/EndObject calls that mark the histogram's
|
|
* JSON creation.
|
|
*/
|
|
void
|
|
internal_ReflectHistogramToJSON(const HistogramSnapshotData& aSnapshot,
|
|
mozilla::JSONWriter& aWriter)
|
|
{
|
|
aWriter.IntProperty("sum", aSnapshot.mSampleSum);
|
|
|
|
// Fill the "counts" property.
|
|
aWriter.StartArrayProperty("counts");
|
|
for (size_t i = 0; i < aSnapshot.mBucketCounts.Length(); i++) {
|
|
aWriter.IntElement(aSnapshot.mBucketCounts[i]);
|
|
}
|
|
aWriter.EndArray();
|
|
}
|
|
|
|
bool
|
|
internal_CanRecordHistogram(const HistogramID id,
|
|
ProcessID aProcessType)
|
|
{
|
|
// Check if we are allowed to record the data.
|
|
if (!CanRecordDataset(gHistogramInfos[id].dataset,
|
|
internal_CanRecordBase(),
|
|
internal_CanRecordExtended())) {
|
|
return false;
|
|
}
|
|
|
|
// Check if we're allowed to record in the given process.
|
|
if (aProcessType == ProcessID::Parent && !internal_IsRecordingEnabled(id)) {
|
|
return false;
|
|
}
|
|
|
|
if (aProcessType != ProcessID::Parent
|
|
&& !CanRecordInProcess(gHistogramInfos[id].record_in_processes, aProcessType)) {
|
|
return false;
|
|
}
|
|
|
|
// Don't record if the current platform is not enabled
|
|
if (!CanRecordProduct(gHistogramInfos[id].products)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
internal_ParseHistogramData(JSContext* aCx, JS::HandleId aEntryId,
|
|
JS::HandleObject aContainerObj, nsACString& aOutName,
|
|
nsTArray<Histogram::Count>& aOutCountArray, int64_t& aOutSum)
|
|
{
|
|
// Get the histogram name.
|
|
nsAutoJSString histogramName;
|
|
if (!histogramName.init(aCx, aEntryId)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
aOutName = NS_ConvertUTF16toUTF8(histogramName);
|
|
|
|
// Get the data for this histogram.
|
|
JS::RootedValue histogramData(aCx);
|
|
if (!JS_GetPropertyById(aCx, aContainerObj, aEntryId, &histogramData)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!histogramData.isObject()) {
|
|
// Histogram data need to be an object. If that's not the case, skip it
|
|
// and try to load the rest of the data.
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Get the "sum" property.
|
|
JS::RootedValue sumValue(aCx);
|
|
JS::RootedObject histogramObj(aCx, &histogramData.toObject());
|
|
if (!JS_GetProperty(aCx, histogramObj, "sum", &sumValue)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!JS::ToInt64(aCx, sumValue, &aOutSum)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Get the "counts" array.
|
|
JS::RootedValue countsArray(aCx);
|
|
bool countsIsArray = false;
|
|
if (!JS_GetProperty(aCx, histogramObj, "counts", &countsArray)
|
|
|| !JS_IsArrayObject(aCx, countsArray, &countsIsArray)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!countsIsArray) {
|
|
// The "counts" property needs to be an array. If this is not the case,
|
|
// skip this histogram.
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Get the length of the array.
|
|
uint32_t countsLen = 0;
|
|
JS::RootedObject countsArrayObj(aCx, &countsArray.toObject());
|
|
if (!JS_GetArrayLength(aCx, countsArrayObj, &countsLen)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Parse the "counts" in the array.
|
|
for (uint32_t arrayIdx = 0; arrayIdx < countsLen; arrayIdx++) {
|
|
JS::RootedValue elementValue(aCx);
|
|
int countAsInt = 0;
|
|
if (!JS_GetElement(aCx, countsArrayObj, arrayIdx, &elementValue)
|
|
|| !JS::ToInt32(aCx, elementValue, &countAsInt)) {
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
aOutCountArray.AppendElement(countAsInt);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // Anonymous namespace
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// PUBLIC: GeckoView serialization/deserialization functions.
|
|
|
|
nsresult
|
|
TelemetryHistogram::SerializeHistograms(mozilla::JSONWriter& aWriter)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess(), "Only save histograms in the parent process");
|
|
if (!XRE_IsParentProcess()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Include the GPU process in histogram snapshots only if we actually tried
|
|
// to launch a process for it.
|
|
bool includeGPUProcess = internal_AttemptedGPUProcess();
|
|
|
|
// Take a snapshot of the histograms.
|
|
HistogramProcessSnapshotsArray processHistArray;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
// We always request the "opt-in"/"prerelease" dataset: we internally
|
|
// record the right subset, so this will only return "prerelease" if
|
|
// it was recorded.
|
|
if (NS_FAILED(internal_GetHistogramsSnapshot(locker,
|
|
nsITelemetry::DATASET_RELEASE_CHANNEL_OPTIN,
|
|
false /* aClearSubsession */,
|
|
includeGPUProcess,
|
|
processHistArray))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// Make the JSON calls on the stashed histograms for every process
|
|
for (uint32_t process = 0; process < processHistArray.length(); ++process) {
|
|
aWriter.StartObjectProperty(GetNameForProcessID(ProcessID(process)));
|
|
|
|
for (const HistogramSnapshotInfo& hData : processHistArray[process]) {
|
|
HistogramID id = hData.histogramID;
|
|
|
|
aWriter.StartObjectProperty(gHistogramInfos[id].name());
|
|
internal_ReflectHistogramToJSON(hData.data, aWriter);
|
|
aWriter.EndObject();
|
|
}
|
|
aWriter.EndObject();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::SerializeKeyedHistograms(mozilla::JSONWriter& aWriter)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess(), "Only save keyed histograms in the parent process");
|
|
if (!XRE_IsParentProcess()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Include the GPU process in histogram snapshots only if we actually tried
|
|
// to launch a process for it.
|
|
bool includeGPUProcess = internal_AttemptedGPUProcess();
|
|
|
|
// Take a snapshot of the keyed histograms.
|
|
KeyedHistogramProcessSnapshotsArray processHistArray;
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
// We always request the "opt-in"/"prerelease" dataset: we internally
|
|
// record the right subset, so this will only return "prerelease" if
|
|
// it was recorded.
|
|
if (NS_FAILED(internal_GetKeyedHistogramsSnapshot(locker,
|
|
nsITelemetry::DATASET_RELEASE_CHANNEL_OPTIN,
|
|
false /* aClearSubsession */,
|
|
includeGPUProcess,
|
|
processHistArray,
|
|
true /* aSkipEmpty */))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Serialize the keyed histograms for every process.
|
|
for (uint32_t process = 0; process < processHistArray.length(); ++process) {
|
|
aWriter.StartObjectProperty(GetNameForProcessID(ProcessID(process)));
|
|
|
|
const KeyedHistogramSnapshotsArray& hArray = processHistArray[process];
|
|
for (size_t i = 0; i < hArray.length(); ++i) {
|
|
const KeyedHistogramSnapshotInfo& hData = hArray[i];
|
|
HistogramID id = hData.histogramId;
|
|
const HistogramInfo& info = gHistogramInfos[id];
|
|
|
|
aWriter.StartObjectProperty(info.name());
|
|
|
|
// Each key is a new object with a "sum" and a "counts" property.
|
|
for (auto iter = hData.data.ConstIter(); !iter.Done(); iter.Next()) {
|
|
HistogramSnapshotData& keyData = iter.Data();
|
|
aWriter.StartObjectProperty(PromiseFlatCString(iter.Key()).get());
|
|
internal_ReflectHistogramToJSON(keyData, aWriter);
|
|
aWriter.EndObject();
|
|
}
|
|
|
|
aWriter.EndObject();
|
|
}
|
|
aWriter.EndObject();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::DeserializeHistograms(JSContext* aCx, JS::HandleValue aData)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess(), "Only load histograms in the parent process");
|
|
if (!XRE_IsParentProcess()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Telemetry is disabled. This should never happen, but let's leave this check
|
|
// for consistency with other histogram updates routines.
|
|
if (!internal_CanRecordBase()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
typedef mozilla::Tuple<nsCString, nsTArray<Histogram::Count>, int64_t>
|
|
PersistedHistogramTuple;
|
|
typedef mozilla::Vector<PersistedHistogramTuple> PersistedHistogramArray;
|
|
typedef mozilla::Vector<PersistedHistogramArray> PersistedHistogramStorage;
|
|
|
|
// Before updating the histograms, we need to get the data out of the JS
|
|
// wrappers. We can't hold the histogram mutex while handling JS stuff.
|
|
// Build a <histogram name, value> map.
|
|
JS::RootedObject histogramDataObj(aCx, &aData.toObject());
|
|
JS::Rooted<JS::IdVector> processes(aCx, JS::IdVector(aCx));
|
|
if (!JS_Enumerate(aCx, histogramDataObj, &processes)) {
|
|
// We can't even enumerate the processes in the loaded data, so
|
|
// there is nothing we could recover from the persistence file. Bail out.
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Make sure we have enough storage for all the processes.
|
|
PersistedHistogramStorage histogramsToUpdate;
|
|
if (!histogramsToUpdate.resize(static_cast<uint32_t>(ProcessID::Count))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// The following block of code attempts to extract as much data as possible
|
|
// from the serialized JSON, even in case of light data corruptions: if, for example,
|
|
// the data for a single process is corrupted or is in an unexpected form, we press on
|
|
// and attempt to load the data for the other processes.
|
|
JS::RootedId process(aCx);
|
|
for (auto& processVal : processes) {
|
|
// This is required as JS API calls require an Handle<jsid> and not a
|
|
// plain jsid.
|
|
process = processVal;
|
|
// Get the process name.
|
|
nsAutoJSString processNameJS;
|
|
if (!processNameJS.init(aCx, process)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Make sure it's valid. Note that this is safe to call outside
|
|
// of a locked section.
|
|
NS_ConvertUTF16toUTF8 processName(processNameJS);
|
|
ProcessID processID = GetIDForProcessName(processName.get());
|
|
if (processID == ProcessID::Count) {
|
|
NS_WARNING(nsPrintfCString("Failed to get process ID for %s", processName.get()).get());
|
|
continue;
|
|
}
|
|
|
|
// And its probes.
|
|
JS::RootedValue processData(aCx);
|
|
if (!JS_GetPropertyById(aCx, histogramDataObj, process, &processData)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
if (!processData.isObject()) {
|
|
// |processData| should be an object containing histograms. If this is
|
|
// not the case, silently skip and try to load the data for the other
|
|
// processes.
|
|
continue;
|
|
}
|
|
|
|
// Iterate through each histogram.
|
|
JS::RootedObject processDataObj(aCx, &processData.toObject());
|
|
JS::Rooted<JS::IdVector> histograms(aCx, JS::IdVector(aCx));
|
|
if (!JS_Enumerate(aCx, processDataObj, &histograms)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Get a reference to the deserialized data for this process.
|
|
PersistedHistogramArray& deserializedProcessData =
|
|
histogramsToUpdate[static_cast<uint32_t>(processID)];
|
|
|
|
JS::RootedId histogram(aCx);
|
|
for (auto& histogramVal : histograms) {
|
|
histogram = histogramVal;
|
|
|
|
int64_t sum = 0;
|
|
nsTArray<Histogram::Count> deserializedCounts;
|
|
nsCString histogramName;
|
|
if (NS_FAILED(internal_ParseHistogramData(aCx, histogram, processDataObj,
|
|
histogramName, deserializedCounts, sum))) {
|
|
continue;
|
|
}
|
|
|
|
// Finally append the deserialized data to the storage.
|
|
if (!deserializedProcessData.emplaceBack(
|
|
MakeTuple(std::move(histogramName), std::move(deserializedCounts), sum))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Update the histogram storage.
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
for (uint32_t process = 0; process < histogramsToUpdate.length(); ++process) {
|
|
PersistedHistogramArray& processArray = histogramsToUpdate[process];
|
|
|
|
for (auto& histogramData : processArray) {
|
|
// Attempt to get the corresponding ID for the deserialized histogram name.
|
|
HistogramID id;
|
|
if (NS_FAILED(internal_GetHistogramIdByName(locker, mozilla::Get<0>(histogramData), &id))) {
|
|
continue;
|
|
}
|
|
|
|
ProcessID procID = static_cast<ProcessID>(process);
|
|
if (!internal_CanRecordHistogram(id, procID)) {
|
|
// We're not allowed to record this, so don't try to restore it.
|
|
continue;
|
|
}
|
|
|
|
// Get the Histogram instance: this will instantiate it if it doesn't exist.
|
|
Histogram* h = internal_GetHistogramById(locker, id, procID);
|
|
MOZ_ASSERT(h);
|
|
|
|
if (!h || internal_IsExpired(locker, h)) {
|
|
// Don't restore expired histograms.
|
|
continue;
|
|
}
|
|
|
|
// Make sure that histogram counts have matching sizes. If not,
|
|
// |AddSampleSet| will fail and crash.
|
|
size_t numCounts = mozilla::Get<1>(histogramData).Length();
|
|
if (h->bucket_count() != numCounts) {
|
|
MOZ_ASSERT(false,
|
|
"The number of restored buckets does not match with the on in the definition");
|
|
continue;
|
|
}
|
|
|
|
// Update the data for the histogram.
|
|
h->AddSampleSet(base::PersistedSampleSet(std::move(mozilla::Get<1>(histogramData)),
|
|
mozilla::Get<2>(histogramData)));
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
TelemetryHistogram::DeserializeKeyedHistograms(JSContext* aCx, JS::HandleValue aData)
|
|
{
|
|
MOZ_ASSERT(XRE_IsParentProcess(), "Only load keyed histograms in the parent process");
|
|
if (!XRE_IsParentProcess()) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Telemetry is disabled. This should never happen, but let's leave this check
|
|
// for consistency with other histogram updates routines.
|
|
if (!internal_CanRecordBase()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
typedef mozilla::Tuple<nsCString, nsCString, nsTArray<Histogram::Count>, int64_t>
|
|
PersistedKeyedHistogramTuple;
|
|
typedef mozilla::Vector<PersistedKeyedHistogramTuple> PersistedKeyedHistogramArray;
|
|
typedef mozilla::Vector<PersistedKeyedHistogramArray> PersistedKeyedHistogramStorage;
|
|
|
|
// Before updating the histograms, we need to get the data out of the JS
|
|
// wrappers. We can't hold the histogram mutex while handling JS stuff.
|
|
// Build a <histogram name, value> map.
|
|
JS::RootedObject histogramDataObj(aCx, &aData.toObject());
|
|
JS::Rooted<JS::IdVector> processes(aCx, JS::IdVector(aCx));
|
|
if (!JS_Enumerate(aCx, histogramDataObj, &processes)) {
|
|
// We can't even enumerate the processes in the loaded data, so
|
|
// there is nothing we could recover from the persistence file. Bail out.
|
|
JS_ClearPendingException(aCx);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Make sure we have enough storage for all the processes.
|
|
PersistedKeyedHistogramStorage histogramsToUpdate;
|
|
if (!histogramsToUpdate.resize(static_cast<uint32_t>(ProcessID::Count))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// The following block of code attempts to extract as much data as possible
|
|
// from the serialized JSON, even in case of light data corruptions: if, for example,
|
|
// the data for a single process is corrupted or is in an unexpected form, we press on
|
|
// and attempt to load the data for the other processes.
|
|
JS::RootedId process(aCx);
|
|
for (auto& processVal : processes) {
|
|
// This is required as JS API calls require an Handle<jsid> and not a
|
|
// plain jsid.
|
|
process = processVal;
|
|
// Get the process name.
|
|
nsAutoJSString processNameJS;
|
|
if (!processNameJS.init(aCx, process)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Make sure it's valid. Note that this is safe to call outside
|
|
// of a locked section.
|
|
NS_ConvertUTF16toUTF8 processName(processNameJS);
|
|
ProcessID processID = GetIDForProcessName(processName.get());
|
|
if (processID == ProcessID::Count) {
|
|
NS_WARNING(nsPrintfCString("Failed to get process ID for %s", processName.get()).get());
|
|
continue;
|
|
}
|
|
|
|
// And its probes.
|
|
JS::RootedValue processData(aCx);
|
|
if (!JS_GetPropertyById(aCx, histogramDataObj, process, &processData)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
if (!processData.isObject()) {
|
|
// |processData| should be an object containing histograms. If this is
|
|
// not the case, silently skip and try to load the data for the other
|
|
// processes.
|
|
continue;
|
|
}
|
|
|
|
// Iterate through each keyed histogram.
|
|
JS::RootedObject processDataObj(aCx, &processData.toObject());
|
|
JS::Rooted<JS::IdVector> histograms(aCx, JS::IdVector(aCx));
|
|
if (!JS_Enumerate(aCx, processDataObj, &histograms)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Get a reference to the deserialized data for this process.
|
|
PersistedKeyedHistogramArray& deserializedProcessData =
|
|
histogramsToUpdate[static_cast<uint32_t>(processID)];
|
|
|
|
JS::RootedId histogram(aCx);
|
|
for (auto& histogramVal : histograms) {
|
|
histogram = histogramVal;
|
|
// Get the histogram name.
|
|
nsAutoJSString histogramName;
|
|
if (!histogramName.init(aCx, histogram)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Get the data for this histogram.
|
|
JS::RootedValue histogramData(aCx);
|
|
if (!JS_GetPropertyById(aCx, processDataObj, histogram, &histogramData)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
// Iterate through each key in the histogram.
|
|
JS::RootedObject keysDataObj(aCx, &histogramData.toObject());
|
|
JS::Rooted<JS::IdVector> keys(aCx, JS::IdVector(aCx));
|
|
if (!JS_Enumerate(aCx, keysDataObj, &keys)) {
|
|
JS_ClearPendingException(aCx);
|
|
continue;
|
|
}
|
|
|
|
JS::RootedId key(aCx);
|
|
for (auto& keyVal : keys) {
|
|
key = keyVal;
|
|
|
|
int64_t sum = 0;
|
|
nsTArray<Histogram::Count> deserializedCounts;
|
|
nsCString keyName;
|
|
if (NS_FAILED(internal_ParseHistogramData(aCx, key, keysDataObj, keyName,
|
|
deserializedCounts, sum))) {
|
|
continue;
|
|
}
|
|
|
|
// Finally append the deserialized data to the storage.
|
|
if (!deserializedProcessData.emplaceBack(
|
|
MakeTuple(nsCString(NS_ConvertUTF16toUTF8(histogramName)), std::move(keyName),
|
|
std::move(deserializedCounts), sum))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Update the keyed histogram storage.
|
|
{
|
|
StaticMutexAutoLock locker(gTelemetryHistogramMutex);
|
|
|
|
for (uint32_t process = 0; process < histogramsToUpdate.length(); ++process) {
|
|
PersistedKeyedHistogramArray& processArray = histogramsToUpdate[process];
|
|
|
|
for (auto& histogramData : processArray) {
|
|
// Attempt to get the corresponding ID for the deserialized histogram name.
|
|
HistogramID id;
|
|
if (NS_FAILED(internal_GetHistogramIdByName(locker, mozilla::Get<0>(histogramData), &id))) {
|
|
continue;
|
|
}
|
|
|
|
ProcessID procID = static_cast<ProcessID>(process);
|
|
if (!internal_CanRecordHistogram(id, procID)) {
|
|
// We're not allowed to record this, so don't try to restore it.
|
|
continue;
|
|
}
|
|
|
|
KeyedHistogram* keyed = internal_GetKeyedHistogramById(id, procID);
|
|
MOZ_ASSERT(keyed);
|
|
|
|
if (!keyed) {
|
|
// Don't restore if we don't have a destination storage.
|
|
continue;
|
|
}
|
|
|
|
// Get data for the key we're looking for.
|
|
Histogram* h = nullptr;
|
|
if (NS_FAILED(keyed->GetHistogram(mozilla::Get<1>(histogramData), &h))) {
|
|
continue;
|
|
}
|
|
MOZ_ASSERT(h);
|
|
|
|
if (!h || internal_IsExpired(locker, h)) {
|
|
// Don't restore expired histograms.
|
|
continue;
|
|
}
|
|
|
|
// Make sure that histogram counts have matching sizes. If not,
|
|
// |AddSampleSet| will fail and crash.
|
|
size_t numCounts = mozilla::Get<2>(histogramData).Length();
|
|
if (h->bucket_count() != numCounts) {
|
|
MOZ_ASSERT(false,
|
|
"The number of restored buckets does not match with the on in the definition");
|
|
continue;
|
|
}
|
|
|
|
// Update the data for the histogram.
|
|
h->AddSampleSet(base::PersistedSampleSet(std::move(mozilla::Get<2>(histogramData)),
|
|
mozilla::Get<3>(histogramData)));
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|