Check for memory leaks

esp32_device/.vscode/settings.json

@@ -33,6 +33,7 @@
     "esp_log.h": "c",
     "http_client.h": "c",
     "string.h": "c",
-    "cjson.h": "c"
+    "cjson.h": "c",
+    "stddef.h": "c"
   }
 }

esp32_device/main/main.c

@@ -17,6 +17,8 @@ void app_main(void)
 {
     esp_log_level_set("*", ESP_LOG_VERBOSE);
 
+    system_show_free_memory();
+
     ESP_LOGI(TAG, "SolarEnergy WT32-ETH01 device");
 
     // Initialize storage
@@ -101,6 +103,21 @@ void app_main(void)
     int status = secure_api_get_device_enrollment_status();
     ESP_LOGI(TAG, "Current enrollment status: %d\n", status);
 
+    // Check for memory leaks
+    size_t before = system_show_free_memory();
+    for (int i = 0; i < 1000; i++)
+    {
+        char *buff = calloc(5000, 1);
+        assert(storage_get_dev_name(buff) > 0);
+        assert(storage_get_root_ca(buff) > 0);
+        free(crypto_get_csr());
+        // secure_api_get_device_enrollment_status();
+        printf("%d\n", i);
+        free(buff);
+    }
+    size_t after = system_show_free_memory();
+    printf("RES before = %d / after = %d / diff = %d\n", before, after, before - after);
+
     system_sleep(120);
 
     reboot();

esp32_device/main/system.c

@@ -1,15 +1,25 @@
 #include "system.h"
 
+#include "esp_log.h"
 #include "esp_system.h"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
+static const char *TAG = "system";
+
 void system_sleep(size_t secs)
 {
     vTaskDelay((1000 * secs) / portTICK_PERIOD_MS);
 }
 
+size_t system_show_free_memory()
+{
+    size_t v = heap_caps_get_free_size(MALLOC_CAP_DEFAULT);
+    ESP_LOGI(TAG, "heap_caps_free_size(MALLOC_CAP_DEFAULT) = %d", v);
+    return v;
+}
+
 void reboot()
 {
     fflush(stdout);

esp32_device/main/system.h

@@ -11,6 +11,11 @@ extern "C"
 {
 #endif
 
+    /**
+     * Get sum of free memory in chip
+     */
+    size_t system_show_free_memory();
+
     /**
      * Sleep for a given amount of time
      */