[Diagnostics] RAM usage diagnostic sources

hal/inc/core_hal.h

@@ -179,6 +179,10 @@ typedef struct runtime_info_t {
     uint16_t flags;             /* reserved, set to 0. */
     uint32_t freeheap;          /* Amount of guaranteed heap memory available. */
     uint32_t system_version;
+    uint32_t total_init_heap;
+    uint32_t total_heap;
+    uint32_t max_used_heap; // The "highwater mark" for allocated space—that is, the maximum amount of space that was ever allocated.
+    uint32_t user_static_ram;
 } runtime_info_t;
 
 uint32_t HAL_Core_Runtime_Info(runtime_info_t* info, void* reserved);

hal/src/stm32f2xx/core_hal_stm32f2xx.c

@@ -59,6 +59,8 @@
 #include "wlan_hal.h"
 #endif
 
+extern char link_heap_location, link_heap_location_end;
+
 #define STOP_MODE_EXIT_CONDITION_PIN 0x01
 #define STOP_MODE_EXIT_CONDITION_RTC 0x02
 
@@ -1239,6 +1241,21 @@ uint32_t HAL_Core_Runtime_Info(runtime_info_t* info, void* reserved)
     struct mallinfo heapinfo = mallinfo();
     // fordblks  The total number of bytes in free blocks.
     info->freeheap = heapinfo.fordblks;
+    if (offsetof(runtime_info_t, total_init_heap) + sizeof(info->total_init_heap) <= info->size) {
+        info->total_init_heap = (uint32_t)(&link_heap_location_end - &link_heap_location);
+    }
+
+    if (offsetof(runtime_info_t, total_heap) + sizeof(info->total_heap) <= info->size) {
+        info->total_heap = heapinfo.arena;
+    }
+
+    if (offsetof(runtime_info_t, max_used_heap) + sizeof(info->max_used_heap) <= info->size) {
+        info->max_used_heap = heapinfo.usmblks;
+    }
+
+    if (offsetof(runtime_info_t, user_static_ram) + sizeof(info->user_static_ram) <= info->size) {
+        info->user_static_ram = info->total_init_heap - info->total_heap;
+    }
 
     return 0;
 }

services/inc/diagnostics.h

@@ -45,6 +45,8 @@ constexpr const char* DIAG_NAME_CLOUD_DISCONNECTS = "cloud:disconn";
 constexpr const char* DIAG_NAME_CLOUD_REPEATED_MESSAGES = "coap:resend";
 constexpr const char* DIAG_NAME_CLOUD_UNACKNOWLEDGED_MESSAGES = "coap:unack";
 constexpr const char* DIAG_NAME_CLOUD_RATE_LIMITED_EVENTS = "pub:limit";
+constexpr const char* DIAG_NAME_SYSTEM_TOTAL_RAM = "sys:tram";
+constexpr const char* DIAG_NAME_SYSTEM_USED_RAM = "sys:uram";
 
 #endif
 
@@ -72,6 +74,8 @@ typedef enum diag_id {
     DIAG_ID_CLOUD_REPEATED_MESSAGES = 21, // coap:resend
     DIAG_ID_CLOUD_UNACKNOWLEDGED_MESSAGES = 22, // coap:unack
     DIAG_ID_CLOUD_RATE_LIMITED_EVENTS = 20, // pub:throttle
+    DIAG_ID_SYSTEM_TOTAL_RAM = 25, // sys:tram
+    DIAG_ID_SYSTEM_USED_RAM = 26, // sys:uram
     DIAG_ID_USER = 32768 // Base value for application-specific source IDs
 } diag_id;
 

system/src/main.cpp

@@ -548,12 +548,46 @@ class UptimeDiagnosticData: public AbstractIntegerDiagnosticData {
     }
 };
 
+class RunTimeInfoDiagnosticData: public AbstractIntegerDiagnosticData {
+public:
+    typedef IntType(*func_t)(const runtime_info_t&);
+    RunTimeInfoDiagnosticData(uint16_t id, const char* name, func_t f) :
+            AbstractIntegerDiagnosticData(id, name),
+            f_(f) {
+    }
+
+    virtual int get(IntType& val) override {
+        runtime_info_t info = {0};
+        info.size = sizeof(info);
+        if (HAL_Core_Runtime_Info(&info, nullptr) == 0) {
+            val = f_(info);
+            return SYSTEM_ERROR_NONE;
+        }
+        return SYSTEM_ERROR_UNKNOWN;
+    }
+
+private:
+    func_t f_;
+};
+
 // Certain HAL events can be generated before app_setup_and_loop() is called. Using constructor of a
 // global variable allows to register a handler for HAL events early
 HALEventHandler g_halEventHandler;
 
 UptimeDiagnosticData g_uptimeDiagData;
 
+RunTimeInfoDiagnosticData g_totalRamDiagData(DIAG_ID_SYSTEM_TOTAL_RAM, DIAG_NAME_SYSTEM_TOTAL_RAM,
+    [](const runtime_info_t& info) -> RunTimeInfoDiagnosticData::IntType {
+        return info.total_init_heap;
+    }
+);
+
+RunTimeInfoDiagnosticData g_usedRamDiagData(DIAG_ID_SYSTEM_USED_RAM, DIAG_NAME_SYSTEM_USED_RAM,
+    [](const runtime_info_t& info) -> RunTimeInfoDiagnosticData::IntType {
+        return (info.total_init_heap - info.freeheap);
+    }
+);
+
 } // namespace
 
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