forked from mirrors/gecko-dev
104 lines
3.5 KiB
C++
104 lines
3.5 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 "mozilla/glean/bindings/MemoryDistribution.h"
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#include "mozilla/Components.h"
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#include "mozilla/glean/bindings/HistogramGIFFTMap.h"
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#include "mozilla/glean/fog_ffi_generated.h"
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#include "nsIClassInfoImpl.h"
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#include "nsJSUtils.h"
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#include "nsPrintfCString.h"
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#include "nsString.h"
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#include "js/PropertyAndElement.h" // JS_DefineProperty
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namespace mozilla::glean {
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namespace impl {
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void MemoryDistributionMetric::Accumulate(size_t aSample) const {
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auto hgramId = HistogramIdForMetric(mId);
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if (hgramId) {
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Telemetry::Accumulate(hgramId.extract(), aSample);
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}
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static_assert(sizeof(size_t) <= sizeof(uint64_t),
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"Memory distribution samples might overflow.");
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fog_memory_distribution_accumulate(mId, aSample);
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}
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Result<Maybe<DistributionData>, nsCString>
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MemoryDistributionMetric::TestGetValue(const nsACString& aPingName) const {
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nsCString err;
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if (fog_memory_distribution_test_get_error(mId, &err)) {
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return Err(err);
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}
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if (!fog_memory_distribution_test_has_value(mId, &aPingName)) {
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return Maybe<DistributionData>();
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}
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nsTArray<uint64_t> buckets;
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nsTArray<uint64_t> counts;
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uint64_t sum;
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fog_memory_distribution_test_get_value(mId, &aPingName, &sum, &buckets,
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&counts);
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return Some(DistributionData(buckets, counts, sum));
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}
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} // namespace impl
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NS_IMPL_CLASSINFO(GleanMemoryDistribution, nullptr, 0, {0})
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NS_IMPL_ISUPPORTS_CI(GleanMemoryDistribution, nsIGleanMemoryDistribution)
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NS_IMETHODIMP
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GleanMemoryDistribution::Accumulate(uint64_t aSample) {
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mMemoryDist.Accumulate(aSample);
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return NS_OK;
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}
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NS_IMETHODIMP
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GleanMemoryDistribution::TestGetValue(const nsACString& aPingName,
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JSContext* aCx,
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JS::MutableHandle<JS::Value> aResult) {
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auto result = mMemoryDist.TestGetValue(aPingName);
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if (result.isErr()) {
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aResult.set(JS::UndefinedValue());
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return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
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}
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auto optresult = result.unwrap();
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if (optresult.isNothing()) {
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aResult.set(JS::UndefinedValue());
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} else {
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// Build return value of the form:
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// { sum: #, values: {bucket1: count1, ...} }
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JS::Rooted<JSObject*> root(aCx, JS_NewPlainObject(aCx));
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if (!root) {
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return NS_ERROR_FAILURE;
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}
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uint64_t sum = optresult.ref().sum;
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if (!JS_DefineProperty(aCx, root, "sum", static_cast<double>(sum),
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JSPROP_ENUMERATE)) {
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return NS_ERROR_FAILURE;
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}
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JS::Rooted<JSObject*> valuesObj(aCx, JS_NewPlainObject(aCx));
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if (!valuesObj ||
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!JS_DefineProperty(aCx, root, "values", valuesObj, JSPROP_ENUMERATE)) {
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return NS_ERROR_FAILURE;
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}
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auto& data = optresult.ref().values;
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for (const auto& entry : data) {
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const uint64_t bucket = entry.GetKey();
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const uint64_t count = entry.GetData();
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if (!JS_DefineProperty(aCx, valuesObj,
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nsPrintfCString("%" PRIu64, bucket).get(),
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static_cast<double>(count), JSPROP_ENUMERATE)) {
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return NS_ERROR_FAILURE;
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}
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}
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aResult.setObject(*root);
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}
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return NS_OK;
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}
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} // namespace mozilla::glean
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