void ThreadProfile::FlushSamplesAndMarkers()
{
// This function is used to serialize the current buffer just before
// JSRuntime destruction.
MOZ_ASSERT(mPseudoStack->mRuntime);
// Unlike StreamJSObject, do not surround the samples in brackets by calling
// aWriter.{Start,End}BareList. The result string will be a comma-separated
// list of JSON object literals that will prepended by StreamJSObject into
// an existing array.
//
// Note that the UniqueStacks instance is persisted so that the frame-index
// mapping is stable across JS shutdown.
mUniqueStacks.emplace(mPseudoStack->mRuntime);
{
SpliceableChunkedJSONWriter b;
b.StartBareList();
{
mBuffer->StreamSamplesToJSON(b, mThreadId, /* aSinceTime = */ 0,
mPseudoStack->mRuntime, *mUniqueStacks);
}
b.EndBareList();
mSavedStreamedSamples = b.WriteFunc()->CopyData();
}
{
SpliceableChunkedJSONWriter b;
b.StartBareList();
{
mBuffer->StreamMarkersToJSON(b, mThreadId, /* aSinceTime = */ 0, *mUniqueStacks);
}
b.EndBareList();
mSavedStreamedMarkers = b.WriteFunc()->CopyData();
}
// Reset the buffer. Attempting to symbolicate JS samples after mRuntime has
// gone away will crash.
mBuffer->reset();
}
UniquePtr<char[]> GeckoSampler::ToJSON(double aSinceTime)
{
SpliceableChunkedJSONWriter b;
StreamJSON(b, aSinceTime);
return b.WriteFunc()->CopyData();
}
UniquePtr<char[]> TableTicker::ToJSON(float aSinceTime)
{
SpliceableChunkedJSONWriter b;
StreamJSON(b, aSinceTime);
return b.WriteFunc()->CopyData();
}
