/
Program.cs
147 lines (135 loc) · 5.88 KB
/
Program.cs
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using System.Text.Json;
using Graphs;
class Program
{
public static void Main(string[] args)
{
if (args.Length < 2)
{
Console.WriteLine("Usage: heap-heap-hurray <input.gcdump> <output.heapsnapshot>");
return;
}
var heapDump = new GCHeapDump(args[0]);
using var output = new FileStream(args[1], FileMode.Create);
using var writer = new Utf8JsonWriter(output);
writer.WriteStartObject();
writer.WriteStartObject("snapshot");
writer.WriteStartObject("meta");
writer.WriteStartArray("node_fields");
writer.WriteStringValue("type");
writer.WriteStringValue("name");
writer.WriteStringValue("id");
writer.WriteStringValue("self_size");
writer.WriteStringValue("edge_count");
writer.WriteStringValue("trace_node_id");
writer.WriteStringValue("detachedness");
writer.WriteEndArray();
writer.WriteStartArray("node_types");
writer.WriteStartArray();
writer.WriteStringValue("hidden");
writer.WriteStringValue("array");
writer.WriteStringValue("string");
writer.WriteStringValue("object");
writer.WriteStringValue("code");
writer.WriteStringValue("closure");
writer.WriteStringValue("regexp");
writer.WriteStringValue("number");
writer.WriteStringValue("native");
writer.WriteStringValue("synthetic");
writer.WriteStringValue("concatenated string");
writer.WriteStringValue("sliced string");
writer.WriteStringValue("symbol");
writer.WriteStringValue("bigint");
writer.WriteStringValue("object shape");
writer.WriteStringValue("wasm object");
writer.WriteEndArray();
writer.WriteStringValue("string");
writer.WriteStringValue("number");
writer.WriteStringValue("number");
writer.WriteStringValue("number");
writer.WriteStringValue("number");
writer.WriteStringValue("number");
writer.WriteEndArray();
writer.WriteStartArray("edge_fields");
writer.WriteStringValue("type");
writer.WriteStringValue("name_or_index");
writer.WriteStringValue("to_node");
writer.WriteEndArray();
writer.WriteStartArray("edge_types");
writer.WriteStartArray();
writer.WriteStringValue("context");
writer.WriteStringValue("element");
writer.WriteStringValue("property");
writer.WriteStringValue("internal");
writer.WriteStringValue("hidden");
writer.WriteStringValue("shortcut");
writer.WriteStringValue("weak");
writer.WriteEndArray();
writer.WriteStringValue("string_or_number");
writer.WriteStringValue("node");
writer.WriteEndArray();
writer.WriteEndObject(); // /meta
writer.WriteNumber("node_count", heapDump.MemoryGraph.NodeCount);
int edgeCount = 0;
Node nodeStorage = heapDump.MemoryGraph.AllocNodeStorage();
for (NodeIndex nodeIndex = 0; nodeIndex < heapDump.MemoryGraph.NodeIndexLimit; nodeIndex++)
{
Node node = heapDump.MemoryGraph.GetNode(nodeIndex, nodeStorage);
edgeCount += node.ChildCount;
}
writer.WriteNumber("edge_count", edgeCount);
writer.WriteNumber("root_index", (long)heapDump.MemoryGraph.RootIndex);
writer.WriteEndObject();
writer.WriteStartArray("nodes");
NodeType typeStorage = heapDump.MemoryGraph.AllocTypeNodeStorage();
for (NodeIndex nodeIndex = 0; nodeIndex < heapDump.MemoryGraph.NodeIndexLimit; nodeIndex++)
{
Node node = heapDump.MemoryGraph.GetNode(nodeIndex, nodeStorage);
MemoryNode? memoryNode = node as MemoryNode;
NodeType type = heapDump.MemoryGraph.GetType(node.TypeIndex, typeStorage);
if (type.ModuleName == null)
writer.WriteNumberValue(9); // type: syntetic
else
writer.WriteNumberValue(3); // type: object
writer.WriteNumberValue((long)node.TypeIndex);
writer.WriteNumberValue(heapDump.MemoryGraph.GetAddress(nodeIndex));
writer.WriteNumberValue(memoryNode?.Size ?? 0);
writer.WriteNumberValue(node.ChildCount);
writer.WriteNumberValue(0); // trace_node_id
writer.WriteNumberValue(0); // detachedness
}
writer.WriteEndArray();
writer.WriteStartArray("edges");
for (NodeIndex nodeIndex = 0; nodeIndex < heapDump.MemoryGraph.NodeIndexLimit; nodeIndex++)
{
Node node = heapDump.MemoryGraph.GetNode(nodeIndex, nodeStorage);
for (NodeIndex childIndex = node.GetFirstChildIndex();
childIndex != NodeIndex.Invalid;
childIndex = node.GetNextChildIndex())
{
writer.WriteNumberValue(2); // type: property
writer.WriteNumberValue(0); // name_or_index
writer.WriteNumberValue((long)childIndex * 7);
}
}
writer.WriteEndArray();
writer.WriteStartArray("trace_function_infos");
writer.WriteEndArray();
writer.WriteStartArray("trace_tree");
writer.WriteEndArray();
writer.WriteStartArray("samples");
writer.WriteEndArray();
writer.WriteStartArray("locations");
writer.WriteEndArray();
writer.WriteStartArray("strings");
for (NodeTypeIndex typeIndex = 0;
typeIndex < heapDump.MemoryGraph.NodeTypeIndexLimit;
typeIndex++)
{
NodeType type = heapDump.MemoryGraph.GetType(typeIndex, typeStorage);
writer.WriteStringValue(type.Name);
}
writer.WriteEndArray();
writer.WriteEndObject();
}
}