Add types and sample heapsnapshot for JSC and V8

1 files changed, 30 insertions, 0 deletions

diff --git a/packages/bun-devtools/heap/v8.d.ts b/packages/bun-devtools/heap/v8.d.ts
new file mode 100644
index 000000000..ce57965c0
--- /dev/null
+++ b/packages/bun-devtools/heap/v8.d.ts
@@ -0,0 +1,30 @@
+export namespace V8 {
+  /**
+   * @link https://github.com/julianburr/chrome-heap-snapshot-parser/blob/master/index.js#L72
+   * @link https://stackoverflow.com/questions/69802133/chrome-heap-snapshot-structure-explanation
+   */
+  export type HeapSnapshot = {
+    snapshot: {
+      meta: {
+        node_fields: string[];
+        node_types: [string[], ...string[]]; // ?
+        edge_fields: string[];
+        edge_types: [string[], ...string[]]; // ?
+        trace_function_info_fields: string[];
+        trace_node_fields: string[];
+        sample_fields: string[];
+        location_fields: string[];
+        node_count: number;
+        edge_count: number;
+        trace_function_count: number;
+      };
+    };
+    nodes: number[];
+    edges: number[];
+    trace_tree: unknown[];
+    trace_function_infos: unknown[];
+    samples: unknown[];
+    locations: number[];
+    strings: string[];
+  };
+}