NS_IMETHODIMP TelemetryImpl::HistogramFrom(const nsACString &name, const nsACString &existing_name, JSContext *cx, jsval *ret) { Histogram *existing; nsresult rv = GetHistogramByName(existing_name, &existing); if (NS_FAILED(rv)) return rv; uint32_t histogramType; bool success = TelemetryHistogramType(existing, &histogramType); if (!success) return NS_ERROR_INVALID_ARG; Histogram *clone; rv = HistogramGet(PromiseFlatCString(name).get(), existing->declared_min(), existing->declared_max(), existing->bucket_count(), histogramType, &clone); if (NS_FAILED(rv)) return rv; Histogram::SampleSet ss; existing->SnapshotSample(&ss); clone->AddSampleSet(ss); return WrapAndReturnHistogram(clone, cx, ret); }
void TelemetryImpl::IdentifyCorruptHistograms(StatisticsRecorder::Histograms &hs) { for (HistogramIterator it = hs.begin(); it != hs.end(); ++it) { Histogram *h = *it; Telemetry::ID id; nsresult rv = GetHistogramEnumId(h->histogram_name().c_str(), &id); // This histogram isn't a static histogram, just ignore it. if (NS_FAILED(rv)) { continue; } if (gCorruptHistograms[id]) { continue; } Histogram::SampleSet ss; h->SnapshotSample(&ss); Histogram::Inconsistencies check = h->FindCorruption(ss); bool corrupt = (check != Histogram::NO_INCONSISTENCIES); if (corrupt) { Telemetry::ID corruptID = Telemetry::HistogramCount; if (check & Histogram::RANGE_CHECKSUM_ERROR) { corruptID = Telemetry::RANGE_CHECKSUM_ERRORS; } else if (check & Histogram::BUCKET_ORDER_ERROR) { corruptID = Telemetry::BUCKET_ORDER_ERRORS; } else if (check & Histogram::COUNT_HIGH_ERROR) { corruptID = Telemetry::TOTAL_COUNT_HIGH_ERRORS; } else if (check & Histogram::COUNT_LOW_ERROR) { corruptID = Telemetry::TOTAL_COUNT_LOW_ERRORS; } Telemetry::Accumulate(corruptID, 1); } gCorruptHistograms[id] = corrupt; } }