NS_IMETHODIMP
TelemetryImpl::GetHistogramById(const nsACString &name, JSContext *cx, jsval *ret)
{
// Cache names
// Note the histogram names are statically allocated
if (!mHistogramMap.Count()) {
for (PRUint32 i = 0; i < Telemetry::HistogramCount; i++) {
CharPtrEntryType *entry = mHistogramMap.PutEntry(gHistograms[i].id);
if (NS_UNLIKELY(!entry)) {
mHistogramMap.Clear();
return NS_ERROR_OUT_OF_MEMORY;
}
entry->mData = (Telemetry::ID) i;
}
}
CharPtrEntryType *entry = mHistogramMap.GetEntry(PromiseFlatCString(name).get());
if (!entry)
return NS_ERROR_FAILURE;
Histogram *h;
nsresult rv = GetHistogramByEnumId(entry->mData, &h);
if (NS_FAILED(rv))
return rv;
return WrapAndReturnHistogram(h, cx, ret);
}
NS_IMETHODIMP
TelemetryImpl::GetHistogramSnapshots(JSContext *cx, jsval *ret)
{
JSObject *root_obj = JS_NewObject(cx, NULL, NULL, NULL);
if (!root_obj)
return NS_ERROR_FAILURE;
*ret = OBJECT_TO_JSVAL(root_obj);
// Ensure that all the HISTOGRAM_FLAG histograms have been created, so
// that their values are snapshotted.
for (size_t i = 0; i < Telemetry::HistogramCount; ++i) {
if (gHistograms[i].histogramType == nsITelemetry::HISTOGRAM_FLAG) {
Histogram *h;
DebugOnly<nsresult> rv = GetHistogramByEnumId(Telemetry::ID(i), &h);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
};
StatisticsRecorder::Histograms hs;
StatisticsRecorder::GetHistograms(&hs);
// We identify corrupt histograms first, rather than interspersing it
// in the loop below, to ensure that our corruption statistics don't
// depend on histogram enumeration order.
//
// Of course, we hope that all of these corruption-statistics
// histograms are not themselves corrupt...
IdentifyCorruptHistograms(hs);
// OK, now we can actually reflect things.
for (HistogramIterator it = hs.begin(); it != hs.end(); ++it) {
Histogram *h = *it;
if (!ShouldReflectHistogram(h) || IsEmpty(h)) {
continue;
}
JSObject *hobj = JS_NewObject(cx, NULL, NULL, NULL);
if (!hobj) {
return NS_ERROR_FAILURE;
}
JS::AutoObjectRooter root(cx, hobj);
switch (ReflectHistogramSnapshot(cx, hobj, h)) {
case REFLECT_CORRUPT:
// We can still hit this case even if ShouldReflectHistograms
// returns true. The histogram lies outside of our control
// somehow; just skip it.
continue;
case REFLECT_FAILURE:
return NS_ERROR_FAILURE;
case REFLECT_OK:
if (!JS_DefineProperty(cx, root_obj, h->histogram_name().c_str(),
OBJECT_TO_JSVAL(hobj), NULL, NULL, JSPROP_ENUMERATE)) {
return NS_ERROR_FAILURE;
}
}
}
return NS_OK;
}
nsresult
TelemetryImpl::GetHistogramByName(const nsACString &name, Histogram **ret)
{
Telemetry::ID id;
nsresult rv = GetHistogramEnumId(PromiseFlatCString(name).get(), &id);
if (NS_FAILED(rv)) {
return rv;
}
rv = GetHistogramByEnumId(id, ret);
if (NS_FAILED(rv))
return rv;
return NS_OK;
}
