feat(esp_riscv_trace): Add trace snapshot to the coredump file

components/esp_system/include/esp_private/panic_internal.h

@@ -103,6 +103,11 @@ bool panic_memprot_fill_info(panic_info_t *info);
  */
 void panic_disable_all_wdts(void);
 
+/**
+ * @brief Stop instruction trace encoders on panic
+ */
+void esp_panic_handler_inst_trace_stop(void) __attribute__((weak));
+
 #ifdef __cplusplus
 }
 #endif

components/esp_system/port/panic_handler.c

@@ -148,6 +148,15 @@ static void panic_handler(void *frame, bool pseudo_excause)
     kasan_disable_checks();
 #endif
 
+#if CONFIG_ESP_RISCV_TRACE_ENABLE
+    /* Stop the instruction trace as early as possible so the capture ends at the
+       crash rather than inside the panic handler. This only stops the encoders.
+       The FIFO flush and snapshot run later at coredump time. */
+    if (esp_panic_handler_inst_trace_stop) {
+        esp_panic_handler_inst_trace_stop();
+    }
+#endif
+
     /* If watchdogs are enabled, the panic handler runs the risk of getting aborted pre-emptively because
      * an overzealous watchdog decides to reset it. Hence, we feed the WDTs here.
      *