Method parseOneGCEvent

deps/v8/tools/heap-stats/trace-file-reader.js:203–239

(actual_data)

  createModelFromChromeTraceFile(contents) {
    const data = Object.create(null);  // Final data container.
    const parseOneGCEvent = (actual_data) => {
      Object.keys(actual_data).forEach(data_set => {
        const string_entry = actual_data[data_set];
        try {
          const entry = JSON.parse(string_entry);
          this.createOrUpdateEntryIfNeeded(data, entry);
          this.createDatasetIfNeeded(data, entry, data_set);
          const isolate = entry.isolate;
          const time = entry.time;
          const gc_id = entry.id;
          data[isolate].gcs[gc_id].time = time;

          const field_data = entry.field_data;
          this.addFieldTypeData(data, isolate, gc_id, data_set,
            field_data.tagged_fields,
            field_data.inobject_smi_fields,
            field_data.embedder_fields,
            field_data.unboxed_double_fields,
            field_data.boxed_double_fields,
            field_data.string_data,
            field_data.other_raw_fields);

          data[isolate].gcs[gc_id][data_set].bucket_sizes =
              entry.bucket_sizes;
          for (let [instance_type, value] of Object.entries(
                   entry.type_data)) {
            // Trace file format uses markers that do not have actual
            // properties.
            if (!('overall' in value)) continue;
            this.addInstanceTypeData(
                data, isolate, gc_id, data_set, instance_type, value);
          }
        } catch (e) {
          console.error('Unable to parse data set entry', e);
        }
      });
    };
    console.log(`Processing log as chrome trace file.`);
    try {
      let gc_events_filter = (event) => {