From 50f9d2601f2a7944e6f52f1f0743ea3d2ef86a6b Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Thu, 28 Oct 2021 17:32:10 +1100
Subject: [PATCH] AP_Arming: log key @SYS files on arming

---
 libraries/AP_Arming/AP_Arming.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/libraries/AP_Arming/AP_Arming.cpp b/libraries/AP_Arming/AP_Arming.cpp
index e8ea152578..3cce73d0c0 100644
--- a/libraries/AP_Arming/AP_Arming.cpp
+++ b/libraries/AP_Arming/AP_Arming.cpp
@@ -1348,6 +1348,25 @@ bool AP_Arming::arm(AP_Arming::Method method, const bool do_arming_checks)
         armed = false;
     }
 
+#if HAL_LOGGER_FILE_CONTENTS_ENABLED
+    /*
+      log files useful for diagnostics on arming. We log on arming as
+      with LOG_DISARMED we don't want to log the statistics at boot or
+      we wouldn't get a realistic idea of key system values
+      Note that some of these files may not exist, in that case they
+      are ignored
+     */
+    static const char *log_content_filenames[] = {
+        "@SYS/uarts.txt",
+        "@SYS/dma.txt",
+        "@SYS/memory.txt",
+        "@SYS/threads.txt",
+        "@ROMFS/hwdef.dat",
+    };
+    for (const auto *name : log_content_filenames) {
+        AP::logger().log_file_content(name);
+    }
+#endif
     return armed;
 }