From 0ce7d86d6a53b38ed75045173da33b277415254d Mon Sep 17 00:00:00 2001
From: Tamas Koczka <poprdi@google.com>
Date: Wed, 28 Jan 2026 14:34:43 +0000
Subject: pkg/codesearch: expose struct layout in codesearch

- Extract struct field offsets and sizes in the C++ codesearch indexer.
- Add 'fields' to the JSON definition output.
- Update pkg/codesearch to parse and expose the new field information.
- Add 'struct-layout' command to syz-codesearch for debugging.
- Add 'codesearch-struct-layout' tool to pkg/aflow/tool/codesearcher/
to allow LLM agents to query struct memory layout and map byte offsets to fields.
- Support pointer marshaling for optional JSON values (e.g. *uint)
---
 pkg/codesearch/testdata/source0.c.json | 70 +++++++++++++++++++++++++++++++---
 1 file changed, 65 insertions(+), 5 deletions(-)

(limited to 'pkg/codesearch/testdata/source0.c.json')

diff --git a/pkg/codesearch/testdata/source0.c.json b/pkg/codesearch/testdata/source0.c.json
index 451ab58cc..39e4b6775 100644
--- a/pkg/codesearch/testdata/source0.c.json
+++ b/pkg/codesearch/testdata/source0.c.json
@@ -192,7 +192,14 @@
 				"start_line": 36,
 				"end_line": 38
 			},
-			"comment": {}
+			"comment": {},
+			"fields": [
+				{
+					"name": "x",
+					"offset": 0,
+					"size": 32
+				}
+			]
 		},
 		{
 			"name": "some_struct",
@@ -202,7 +209,19 @@
 				"start_line": 17,
 				"end_line": 20
 			},
-			"comment": {}
+			"comment": {},
+			"fields": [
+				{
+					"name": "x",
+					"offset": 0,
+					"size": 32
+				},
+				{
+					"name": "y",
+					"offset": 32,
+					"size": 32
+				}
+			]
 		},
 		{
 			"name": "some_struct_with_a_comment",
@@ -216,7 +235,19 @@
 				"file": "source0.h",
 				"start_line": 24,
 				"end_line": 26
-			}
+			},
+			"fields": [
+				{
+					"name": "x",
+					"offset": 0,
+					"size": 32
+				},
+				{
+					"name": "other_struct",
+					"offset": 64,
+					"size": 64
+				}
+			]
 		},
 		{
 			"name": "struct_in_c_file",
@@ -226,7 +257,19 @@
 				"start_line": 6,
 				"end_line": 9
 			},
-			"comment": {}
+			"comment": {},
+			"fields": [
+				{
+					"name": "X",
+					"offset": 0,
+					"size": 32
+				},
+				{
+					"name": "by_value",
+					"offset": 32,
+					"size": 64
+				}
+			]
 		},
 		{
 			"name": "some_union",
@@ -236,7 +279,24 @@
 				"start_line": 40,
 				"end_line": 44
 			},
-			"comment": {}
+			"comment": {},
+			"fields": [
+				{
+					"name": "x",
+					"offset": 0,
+					"size": 32
+				},
+				{
+					"name": "p",
+					"offset": 0,
+					"size": 64
+				},
+				{
+					"name": "s",
+					"offset": 0,
+					"size": 64
+				}
+			]
 		},
 		{
 			"name": "some_enum",
-- 
cgit mrf-deployment