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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/glean/bindings/MemoryDistribution.h"
#include "mozilla/Components.h"
#include "mozilla/Maybe.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/glean/bindings/HistogramGIFFTMap.h"
#include "mozilla/glean/fog_ffi_generated.h"
#include "nsIClassInfoImpl.h"
#include "nsJSUtils.h"
#include "nsPrintfCString.h"
#include "nsString.h"
#include "js/PropertyAndElement.h" // JS_DefineProperty
namespace mozilla::glean {
namespace impl {
void MemoryDistributionMetric::Accumulate(size_t aSample) const {
auto hgramId = HistogramIdForMetric(mId);
if (hgramId) {
Telemetry::Accumulate(hgramId.extract(), aSample);
}
static_assert(sizeof(size_t) <= sizeof(uint64_t),
"Memory distribution samples might overflow.");
fog_memory_distribution_accumulate(mId, aSample);
}
Result<Maybe<DistributionData>, nsCString>
MemoryDistributionMetric::TestGetValue(const nsACString& aPingName) const {
nsCString err;
if (fog_memory_distribution_test_get_error(mId, &err)) {
return Err(err);
}
if (!fog_memory_distribution_test_has_value(mId, &aPingName)) {
return Maybe<DistributionData>();
}
nsTArray<uint64_t> buckets;
nsTArray<uint64_t> counts;
uint64_t sum;
fog_memory_distribution_test_get_value(mId, &aPingName, &sum, &buckets,
&counts);
return Some(DistributionData(buckets, counts, sum));
}
} // namespace impl
NS_IMPL_CLASSINFO(GleanMemoryDistribution, nullptr, 0, {0})
NS_IMPL_ISUPPORTS_CI(GleanMemoryDistribution, nsIGleanMemoryDistribution)
NS_IMETHODIMP
GleanMemoryDistribution::Accumulate(uint64_t aSample) {
mMemoryDist.Accumulate(aSample);
return NS_OK;
}
NS_IMETHODIMP
GleanMemoryDistribution::TestGetValue(const nsACString& aPingName,
JSContext* aCx,
JS::MutableHandle<JS::Value> aResult) {
auto result = mMemoryDist.TestGetValue(aPingName);
if (result.isErr()) {
aResult.set(JS::UndefinedValue());
return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
}
auto optresult = result.unwrap();
if (optresult.isNothing()) {
aResult.set(JS::UndefinedValue());
} else {
// Build return value of the form:
// { sum: #, values: {bucket1: count1, ...} }
JS::Rooted<JSObject*> root(aCx, JS_NewPlainObject(aCx));
if (!root) {
return NS_ERROR_FAILURE;
}
uint64_t sum = optresult.ref().sum;
if (!JS_DefineProperty(aCx, root, "sum", static_cast<double>(sum),
JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
JS::Rooted<JSObject*> valuesObj(aCx, JS_NewPlainObject(aCx));
if (!valuesObj ||
!JS_DefineProperty(aCx, root, "values", valuesObj, JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
auto& data = optresult.ref().values;
for (const auto& entry : data) {
const uint64_t bucket = entry.GetKey();
const uint64_t count = entry.GetData();
if (!JS_DefineProperty(aCx, valuesObj,
nsPrintfCString("%" PRIu64, bucket).get(),
static_cast<double>(count), JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
}
aResult.setObject(*root);
}
return NS_OK;
}
} // namespace mozilla::glean
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