From 3389dd306bb3550c57c00a5c5f3211b72b099b62 Mon Sep 17 00:00:00 2001
From: Mason Tran <Mason.Tran@silabs.com>
Date: Fri, 2 Feb 2024 12:49:31 -0500
Subject: [PATCH] [diag] add `diag fault <faultType>` and `diag ci` commands

`diag fault <faultType>` allows users to trigger various fault types

`diag ci` prints crash info
---
 src/src/diag.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

diff --git a/src/src/diag.c b/src/src/diag.c
index cd15f47f..b7340faf 100644
--- a/src/src/diag.c
+++ b/src/src/diag.c
@@ -65,6 +65,10 @@
 #include "sl_rail_util_ant_div.h"
 #endif
 
+#ifdef SL_CATALOG_OT_CRASH_HANDLER_PRESENT
+#include PLATFORM_HEADER
+#endif
+
 #define GPIO_PIN_BITMASK 0xFFFFUL
 #define GPIO_PORT_BITMASK (0xFFFFUL << 16)
 #define GET_GPIO_PIN(x) (x & GPIO_PIN_BITMASK)
@@ -147,12 +151,78 @@ static otError processAutoAck(otInstance *aInstance,
     return error;
 }
 
+#if defined(SL_CATALOG_OT_CRASH_HANDLER_PRESENT)
+static otError processFault(otInstance *aInstance,
+                            uint8_t     aArgsLength,
+                            char       *aArgs[],
+                            char       *aOutput,
+                            size_t      aOutputMaxLen)
+{
+    OT_UNUSED_VARIABLE(aInstance);
+    OT_UNUSED_VARIABLE(aArgs);
+
+    otError error = OT_ERROR_FAILED;
+
+    VerifyOrExit(otPlatDiagModeGet(), error = OT_ERROR_INVALID_STATE);
+    if (aArgsLength == 0)
+    {
+        // Trigger an invalid memory access
+        int x = 0;
+        x += *((uint32_t *)0xdeadc0de);
+        otCliOutputFormat("%d", x);
+    }
+    else if (strcmp(aArgs[0], "assert") == 0)
+    {
+        assert(0);
+    }
+    else if (strcmp(aArgs[0], "udf") == 0)
+    {
+        asm("udf");
+    }
+    else if (strcmp(aArgs[0], "bkpt") == 0)
+    {
+        asm("bkpt");
+    }
+
+exit:
+    // Should not be reached
+    appendErrorResult(error, aOutput, aOutputMaxLen);
+    return error;
+}
+
+static otError processCrashInfo(otInstance *aInstance,
+                                uint8_t     aArgsLength,
+                                char       *aArgs[],
+                                char       *aOutput,
+                                size_t      aOutputMaxLen)
+{
+    OT_UNUSED_VARIABLE(aInstance);
+    OT_UNUSED_VARIABLE(aArgs);
+    OT_UNUSED_VARIABLE(aOutput);
+    OT_UNUSED_VARIABLE(aOutputMaxLen);
+
+    otError error = OT_ERROR_NONE;
+    VerifyOrExit(aArgsLength == 0, error = OT_ERROR_INVALID_ARGS);
+
+#if CORTEXM3_EFR32
+    efr32PrintResetInfo();
+#endif
+
+exit:
+    return error;
+}
+#endif
+
 // *****************************************************************************
 // Add more platform specific diagnostic's CLI features here.
 // *****************************************************************************
 const struct PlatformDiagCommand sCommands[] = {
     {"addr-match", &processAddressMatch},
     {"auto-ack", &processAutoAck},
+#if defined(SL_CATALOG_OT_CRASH_HANDLER_PRESENT)
+    {"fault", &processFault},
+    {"ci", &processCrashInfo},
+#endif
 };
 
 otError otPlatDiagProcess(otInstance *aInstance,