[FL-2274] Inventing streams and moving FFF to them (#981)

* Streams: string stream
* String stream: updated insert/delete api
* Streams: generic stream interface and string stream implementation
* Streams: helpers for insert and delete_and_insert
* FFF: now compatible with streams
* MinUnit: introduced tests with arguments
* FFF: stream access violation
* Streams: copy data between streams
* Streams: file stream
* FFF: documentation
* FFStream: documentation
* FFF: alloc as file
* MinUnit: support for nested tests
* Streams: changed delete_and_insert, now it returns success flag. Added ability dump stream inner parameters and data to cout.
* FFF: simplified file open function
* Streams: unit tests
* FFF: tests
* Streams: declare cache_size constant as define, to allow variable modified arrays
* FFF: lib moved to a separate folder
* iButton: new FFF
* RFID: new FFF
* Animations: new FFF
* IR: new FFF
* NFC: new FFF
* Flipper file format: delete lib
* U2F: new FFF
* Subghz: new FFF and streams
* Streams: read line
* Streams: split
* FuriCore: implement memset with extra asserts
* FuriCore: implement extra heap asserts without inventing memset
* Scene manager: protected access to the scene id stack with a size check
* NFC worker: dirty fix for issue where hal_nfc was busy on app start
* Furi: update allocator to erase memory on allocation. Replace furi_alloc with malloc.
* FuriCore: cleanup memmgr code.
* Furi HAL: furi_hal_init is split into critical and non-critical parts. The critical part is currently clock and console.
* Memmgr: added ability to track allocations and deallocations through console.
* FFStream: some speedup
* Streams, FF: minor fixes
* Tests: restore
* File stream: a slightly more thread-safe version of file_stream_delete_and_insert

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

firmware/targets/f6/Src/main.c

@@ -7,6 +7,9 @@
 #define TAG "Main"
 
 int main(void) {
+    // Flipper critical FURI HAL
+    furi_hal_init_critical();
+
     // Initialize FURI layer
     furi_init();
 

firmware/targets/f6/ble_glue/battery_service.c

@@ -17,7 +17,7 @@ static const uint16_t service_uuid = BATTERY_SERVICE_UUID;
 static const uint16_t char_battery_level_uuid = BATTERY_LEVEL_CHAR_UUID;
 
 void battery_svc_start() {
-    battery_svc = furi_alloc(sizeof(BatterySvc));
+    battery_svc = malloc(sizeof(BatterySvc));
     tBleStatus status;
 
     // Add Battery service

firmware/targets/f6/ble_glue/ble_app.c

@@ -35,7 +35,7 @@ static void ble_app_hci_status_not_handler(HCI_TL_CmdStatus_t status);
 
 bool ble_app_init() {
     SHCI_CmdStatus_t status;
-    ble_app = furi_alloc(sizeof(BleApp));
+    ble_app = malloc(sizeof(BleApp));
     // Allocate semafore and mutex for ble command buffer access
     ble_app->hci_mtx = osMutexNew(NULL);
     ble_app->hci_sem = osSemaphoreNew(1, 0, NULL);

firmware/targets/f6/ble_glue/ble_glue.c

@@ -64,7 +64,7 @@ void ble_glue_set_key_storage_changed_callback(
 }
 
 void ble_glue_init() {
-    ble_glue = furi_alloc(sizeof(BleGlue));
+    ble_glue = malloc(sizeof(BleGlue));
     ble_glue->status = BleGlueStatusStartup;
 
     // Configure the system Power Mode

firmware/targets/f6/ble_glue/dev_info_service.c

@@ -23,7 +23,7 @@ static const char dev_info_software_rev_num[] = GIT_COMMIT " " GIT_BRANCH " " GI
                                                            " " BUILD_DATE;
 
 void dev_info_svc_start() {
-    dev_info_svc = furi_alloc(sizeof(DevInfoSvc));
+    dev_info_svc = malloc(sizeof(DevInfoSvc));
     tBleStatus status;
 
     // Add Device Information Service

firmware/targets/f6/ble_glue/gap.c

@@ -463,7 +463,7 @@ bool gap_init(GapConfig* config, GapEventCallback on_event_cb, void* context) {
         return false;
     }
 
-    gap = furi_alloc(sizeof(Gap));
+    gap = malloc(sizeof(Gap));
     gap->config = config;
     srand(DWT->CYCCNT);
     // Create advertising timer
@@ -516,7 +516,7 @@ GapState gap_get_state() {
 
 void gap_start_scan(GapScanCallback callback, void* context) {
     furi_assert(callback);
-    gap_scan = furi_alloc(sizeof(GapScan));
+    gap_scan = malloc(sizeof(GapScan));
     gap_scan->callback = callback;
     gap_scan->context = context;
     // Scan interval 250 ms

firmware/targets/f6/ble_glue/hid_service.c

@@ -38,7 +38,7 @@ static SVCCTL_EvtAckStatus_t hid_svc_event_handler(void* event) {
 
 void hid_svc_start() {
     tBleStatus status;
-    hid_svc = furi_alloc(sizeof(HIDSvc));
+    hid_svc = malloc(sizeof(HIDSvc));
     Service_UUID_t svc_uuid = {};
     Char_Desc_Uuid_t desc_uuid = {};
     Char_UUID_t char_uuid = {};

firmware/targets/f6/ble_glue/serial_service.c

@@ -82,7 +82,7 @@ static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void* event) {
 
 void serial_svc_start() {
     tBleStatus status;
-    serial_svc = furi_alloc(sizeof(SerialSvc));
+    serial_svc = malloc(sizeof(SerialSvc));
     // Register event handler
     SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
 

firmware/targets/f6/fatfs/stm32_adafruit_sd.c

@@ -435,7 +435,7 @@ uint8_t
         goto error;
     }
 
-    ptr = furi_alloc(sizeof(uint8_t) * BlockSize);
+    ptr = malloc(sizeof(uint8_t) * BlockSize);
     if(ptr == NULL) {
         goto error;
     }
@@ -516,7 +516,7 @@ uint8_t BSP_SD_WriteBlocks(
         goto error;
     }
 
-    ptr = furi_alloc(sizeof(uint8_t) * BlockSize);
+    ptr = malloc(sizeof(uint8_t) * BlockSize);
     if(ptr == NULL) {
         goto error;
     }

firmware/targets/f6/furi_hal/furi_hal.c

@@ -11,9 +11,7 @@
 #define TAG "FuriHal"
 
 void furi_hal_init() {
-    furi_hal_clock_init();
     furi_hal_rtc_init();
-    furi_hal_console_init();
     furi_hal_interrupt_init();
     furi_hal_delay_init();
 
@@ -71,3 +69,8 @@ void furi_hal_init() {
             LL_MPU_INSTRUCTION_ACCESS_ENABLE);
     LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
 }
+
+void furi_hal_init_critical() {
+    furi_hal_clock_init();
+    furi_hal_console_init();
+}

firmware/targets/f6/furi_hal/furi_hal_bt_hid.c

@@ -147,8 +147,8 @@ void furi_hal_bt_hid_start() {
         hid_svc_start();
     }
     // Configure HID Keyboard
-    kb_report = furi_alloc(sizeof(FuriHalBtHidKbReport));
-    media_report = furi_alloc(sizeof(FuriHalBtHidMediaReport));
+    kb_report = malloc(sizeof(FuriHalBtHidKbReport));
+    media_report = malloc(sizeof(FuriHalBtHidMediaReport));
     // Configure Report Map characteristic
     hid_svc_update_report_map(
         furi_hal_bt_hid_report_map_data, sizeof(furi_hal_bt_hid_report_map_data));

firmware/targets/f6/furi_hal/furi_hal_compress.c

@@ -41,7 +41,7 @@ static void furi_hal_compress_reset(FuriHalCompress* compress) {
 }
 
 void furi_hal_compress_icon_init() {
-    icon_decoder = furi_alloc(sizeof(FuriHalCompressIcon));
+    icon_decoder = malloc(sizeof(FuriHalCompressIcon));
     icon_decoder->decoder = heatshrink_decoder_alloc(
         icon_decoder->compress_buff,
         FURI_HAL_COMPRESS_ICON_ENCODED_BUFF_SIZE,
@@ -84,8 +84,8 @@ void furi_hal_compress_icon_decode(const uint8_t* icon_data, uint8_t** decoded_b
 }
 
 FuriHalCompress* furi_hal_compress_alloc(uint16_t compress_buff_size) {
-    FuriHalCompress* compress = furi_alloc(sizeof(FuriHalCompress));
-    compress->compress_buff = furi_alloc(compress_buff_size + FURI_HAL_COMPRESS_EXP_BUFF_SIZE);
+    FuriHalCompress* compress = malloc(sizeof(FuriHalCompress));
+    compress->compress_buff = malloc(compress_buff_size + FURI_HAL_COMPRESS_EXP_BUFF_SIZE);
     compress->encoder = heatshrink_encoder_alloc(
         compress->compress_buff,
         FURI_HAL_COMPRESS_EXP_BUFF_SIZE_LOG,

firmware/targets/f6/furi_hal/furi_hal_console.c

@@ -12,15 +12,17 @@
 
 #define TAG "FuriHalConsole"
 
+#ifdef HEAP_PRINT_DEBUG
+#define CONSOLE_BAUDRATE 1843200
+#else
 #define CONSOLE_BAUDRATE 230400
+#endif
 
 volatile bool furi_hal_console_alive = false;
 
 void furi_hal_console_init() {
     furi_hal_uart_init(FuriHalUartIdUSART1, CONSOLE_BAUDRATE);
     furi_hal_console_alive = true;
-
-    FURI_LOG_I(TAG, "Init OK");
 }
 
 void furi_hal_console_enable() {

firmware/targets/f6/furi_hal/furi_hal_irda.c

@@ -588,13 +588,13 @@ void furi_hal_irda_async_tx_start(uint32_t freq, float duty_cycle) {
     furi_assert(irda_tim_tx.buffer[1].polarity == NULL);
 
     size_t alloc_size_data = IRDA_TIM_TX_DMA_BUFFER_SIZE * sizeof(uint16_t);
-    irda_tim_tx.buffer[0].data = furi_alloc(alloc_size_data);
-    irda_tim_tx.buffer[1].data = furi_alloc(alloc_size_data);
+    irda_tim_tx.buffer[0].data = malloc(alloc_size_data);
+    irda_tim_tx.buffer[1].data = malloc(alloc_size_data);
 
     size_t alloc_size_polarity =
         (IRDA_TIM_TX_DMA_BUFFER_SIZE + IRDA_POLARITY_SHIFT) * sizeof(uint8_t);
-    irda_tim_tx.buffer[0].polarity = furi_alloc(alloc_size_polarity);
-    irda_tim_tx.buffer[1].polarity = furi_alloc(alloc_size_polarity);
+    irda_tim_tx.buffer[0].polarity = malloc(alloc_size_polarity);
+    irda_tim_tx.buffer[1].polarity = malloc(alloc_size_polarity);
 
     irda_tim_tx.stop_semaphore = osSemaphoreNew(1, 0, NULL);
     irda_tim_tx.cycle_duration = 1000000.0 / freq;

firmware/targets/f6/furi_hal/furi_hal_subghz.c

@@ -874,7 +874,7 @@ bool furi_hal_subghz_start_async_tx(FuriHalSubGhzAsyncTxCallback callback, void*
     furi_hal_subghz_async_tx.duty_high = 0;
 
     furi_hal_subghz_async_tx.buffer =
-        furi_alloc(API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
+        malloc(API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
     furi_hal_subghz_async_tx_refill(
         furi_hal_subghz_async_tx.buffer, API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL);
 

firmware/targets/f6/furi_hal/furi_hal_usb_cdc.c

@@ -434,14 +434,14 @@ static void cdc_init(usbd_device* dev, FuriHalUsbInterface* intf) {
 
     char* name = (char*)furi_hal_version_get_device_name_ptr();
     uint8_t len = (name == NULL) ? (0) : (strlen(name));
-    struct usb_string_descriptor* dev_prod_desc = furi_alloc(len * 2 + 2);
+    struct usb_string_descriptor* dev_prod_desc = malloc(len * 2 + 2);
     dev_prod_desc->bLength = len * 2 + 2;
     dev_prod_desc->bDescriptorType = USB_DTYPE_STRING;
     for(uint8_t i = 0; i < len; i++) dev_prod_desc->wString[i] = name[i];
 
     name = (char*)furi_hal_version_get_name_ptr();
     len = (name == NULL) ? (0) : (strlen(name));
-    struct usb_string_descriptor* dev_serial_desc = furi_alloc((len + 5) * 2 + 2);
+    struct usb_string_descriptor* dev_serial_desc = malloc((len + 5) * 2 + 2);
     dev_serial_desc->bLength = (len + 5) * 2 + 2;
     dev_serial_desc->bDescriptorType = USB_DTYPE_STRING;
     memcpy(dev_serial_desc->wString, "f\0l\0i\0p\0_\0", 5 * 2);

firmware/targets/f6/furi_hal/furi_hal_vcp.c

@@ -58,7 +58,7 @@ static const uint8_t ascii_soh = 0x01;
 static const uint8_t ascii_eot = 0x04;
 
 void furi_hal_vcp_init() {
-    vcp = furi_alloc(sizeof(FuriHalVcp));
+    vcp = malloc(sizeof(FuriHalVcp));
     vcp->connected = false;
 
     vcp->tx_stream = xStreamBufferCreate(VCP_TX_BUF_SIZE, 1);

firmware/targets/f7/Src/main.c

@@ -7,6 +7,9 @@
 #define TAG "Main"
 
 int main(void) {
+    // Flipper critical FURI HAL
+    furi_hal_init_critical();
+
     // Initialize FURI layer
     furi_init();
 

firmware/targets/f7/ble_glue/battery_service.c

@@ -17,7 +17,7 @@ static const uint16_t service_uuid = BATTERY_SERVICE_UUID;
 static const uint16_t char_battery_level_uuid = BATTERY_LEVEL_CHAR_UUID;
 
 void battery_svc_start() {
-    battery_svc = furi_alloc(sizeof(BatterySvc));
+    battery_svc = malloc(sizeof(BatterySvc));
     tBleStatus status;
 
     // Add Battery service

firmware/targets/f7/ble_glue/ble_app.c

@@ -35,7 +35,7 @@ static void ble_app_hci_status_not_handler(HCI_TL_CmdStatus_t status);
 
 bool ble_app_init() {
     SHCI_CmdStatus_t status;
-    ble_app = furi_alloc(sizeof(BleApp));
+    ble_app = malloc(sizeof(BleApp));
     // Allocate semafore and mutex for ble command buffer access
     ble_app->hci_mtx = osMutexNew(NULL);
     ble_app->hci_sem = osSemaphoreNew(1, 0, NULL);

firmware/targets/f7/ble_glue/ble_glue.c

@@ -64,7 +64,7 @@ void ble_glue_set_key_storage_changed_callback(
 }
 
 void ble_glue_init() {
-    ble_glue = furi_alloc(sizeof(BleGlue));
+    ble_glue = malloc(sizeof(BleGlue));
     ble_glue->status = BleGlueStatusStartup;
 
     // Configure the system Power Mode

firmware/targets/f7/ble_glue/dev_info_service.c

@@ -23,7 +23,7 @@ static const char dev_info_software_rev_num[] = GIT_COMMIT " " GIT_BRANCH " " GI
                                                            " " BUILD_DATE;
 
 void dev_info_svc_start() {
-    dev_info_svc = furi_alloc(sizeof(DevInfoSvc));
+    dev_info_svc = malloc(sizeof(DevInfoSvc));
     tBleStatus status;
 
     // Add Device Information Service

firmware/targets/f7/ble_glue/gap.c

@@ -463,7 +463,7 @@ bool gap_init(GapConfig* config, GapEventCallback on_event_cb, void* context) {
         return false;
     }
 
-    gap = furi_alloc(sizeof(Gap));
+    gap = malloc(sizeof(Gap));
     gap->config = config;
     srand(DWT->CYCCNT);
     // Create advertising timer
@@ -516,7 +516,7 @@ GapState gap_get_state() {
 
 void gap_start_scan(GapScanCallback callback, void* context) {
     furi_assert(callback);
-    gap_scan = furi_alloc(sizeof(GapScan));
+    gap_scan = malloc(sizeof(GapScan));
     gap_scan->callback = callback;
     gap_scan->context = context;
     // Scan interval 250 ms

firmware/targets/f7/ble_glue/hid_service.c

@@ -38,7 +38,7 @@ static SVCCTL_EvtAckStatus_t hid_svc_event_handler(void* event) {
 
 void hid_svc_start() {
     tBleStatus status;
-    hid_svc = furi_alloc(sizeof(HIDSvc));
+    hid_svc = malloc(sizeof(HIDSvc));
     Service_UUID_t svc_uuid = {};
     Char_Desc_Uuid_t desc_uuid = {};
     Char_UUID_t char_uuid = {};

firmware/targets/f7/ble_glue/serial_service.c

@@ -82,7 +82,7 @@ static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void* event) {
 
 void serial_svc_start() {
     tBleStatus status;
-    serial_svc = furi_alloc(sizeof(SerialSvc));
+    serial_svc = malloc(sizeof(SerialSvc));
     // Register event handler
     SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
 

firmware/targets/f7/fatfs/stm32_adafruit_sd.c

@@ -435,7 +435,7 @@ uint8_t
         goto error;
     }
 
-    ptr = furi_alloc(sizeof(uint8_t) * BlockSize);
+    ptr = malloc(sizeof(uint8_t) * BlockSize);
     if(ptr == NULL) {
         goto error;
     }
@@ -516,7 +516,7 @@ uint8_t BSP_SD_WriteBlocks(
         goto error;
     }
 
-    ptr = furi_alloc(sizeof(uint8_t) * BlockSize);
+    ptr = malloc(sizeof(uint8_t) * BlockSize);
     if(ptr == NULL) {
         goto error;
     }

firmware/targets/f7/furi_hal/furi_hal.c

@@ -11,9 +11,7 @@
 #define TAG "FuriHal"
 
 void furi_hal_init() {
-    furi_hal_clock_init();
     furi_hal_rtc_init();
-    furi_hal_console_init();
     furi_hal_interrupt_init();
     furi_hal_delay_init();
 
@@ -71,3 +69,8 @@ void furi_hal_init() {
             LL_MPU_INSTRUCTION_ACCESS_ENABLE);
     LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
 }
+
+void furi_hal_init_critical() {
+    furi_hal_clock_init();
+    furi_hal_console_init();
+}

firmware/targets/f7/furi_hal/furi_hal_bt_hid.c

@@ -147,8 +147,8 @@ void furi_hal_bt_hid_start() {
         hid_svc_start();
     }
     // Configure HID Keyboard
-    kb_report = furi_alloc(sizeof(FuriHalBtHidKbReport));
-    media_report = furi_alloc(sizeof(FuriHalBtHidMediaReport));
+    kb_report = malloc(sizeof(FuriHalBtHidKbReport));
+    media_report = malloc(sizeof(FuriHalBtHidMediaReport));
     // Configure Report Map characteristic
     hid_svc_update_report_map(
         furi_hal_bt_hid_report_map_data, sizeof(furi_hal_bt_hid_report_map_data));

firmware/targets/f7/furi_hal/furi_hal_compress.c

@@ -41,7 +41,7 @@ static void furi_hal_compress_reset(FuriHalCompress* compress) {
 }
 
 void furi_hal_compress_icon_init() {
-    icon_decoder = furi_alloc(sizeof(FuriHalCompressIcon));
+    icon_decoder = malloc(sizeof(FuriHalCompressIcon));
     icon_decoder->decoder = heatshrink_decoder_alloc(
         icon_decoder->compress_buff,
         FURI_HAL_COMPRESS_ICON_ENCODED_BUFF_SIZE,
@@ -84,8 +84,8 @@ void furi_hal_compress_icon_decode(const uint8_t* icon_data, uint8_t** decoded_b
 }
 
 FuriHalCompress* furi_hal_compress_alloc(uint16_t compress_buff_size) {
-    FuriHalCompress* compress = furi_alloc(sizeof(FuriHalCompress));
-    compress->compress_buff = furi_alloc(compress_buff_size + FURI_HAL_COMPRESS_EXP_BUFF_SIZE);
+    FuriHalCompress* compress = malloc(sizeof(FuriHalCompress));
+    compress->compress_buff = malloc(compress_buff_size + FURI_HAL_COMPRESS_EXP_BUFF_SIZE);
     compress->encoder = heatshrink_encoder_alloc(
         compress->compress_buff,
         FURI_HAL_COMPRESS_EXP_BUFF_SIZE_LOG,

firmware/targets/f7/furi_hal/furi_hal_console.c

@@ -12,15 +12,17 @@
 
 #define TAG "FuriHalConsole"
 
+#ifdef HEAP_PRINT_DEBUG
+#define CONSOLE_BAUDRATE 1843200
+#else
 #define CONSOLE_BAUDRATE 230400
+#endif
 
 volatile bool furi_hal_console_alive = false;
 
 void furi_hal_console_init() {
     furi_hal_uart_init(FuriHalUartIdUSART1, CONSOLE_BAUDRATE);
     furi_hal_console_alive = true;
-
-    FURI_LOG_I(TAG, "Init OK");
 }
 
 void furi_hal_console_enable() {

firmware/targets/f7/furi_hal/furi_hal_irda.c

@@ -588,13 +588,13 @@ void furi_hal_irda_async_tx_start(uint32_t freq, float duty_cycle) {
     furi_assert(irda_tim_tx.buffer[1].polarity == NULL);
 
     size_t alloc_size_data = IRDA_TIM_TX_DMA_BUFFER_SIZE * sizeof(uint16_t);
-    irda_tim_tx.buffer[0].data = furi_alloc(alloc_size_data);
-    irda_tim_tx.buffer[1].data = furi_alloc(alloc_size_data);
+    irda_tim_tx.buffer[0].data = malloc(alloc_size_data);
+    irda_tim_tx.buffer[1].data = malloc(alloc_size_data);
 
     size_t alloc_size_polarity =
         (IRDA_TIM_TX_DMA_BUFFER_SIZE + IRDA_POLARITY_SHIFT) * sizeof(uint8_t);
-    irda_tim_tx.buffer[0].polarity = furi_alloc(alloc_size_polarity);
-    irda_tim_tx.buffer[1].polarity = furi_alloc(alloc_size_polarity);
+    irda_tim_tx.buffer[0].polarity = malloc(alloc_size_polarity);
+    irda_tim_tx.buffer[1].polarity = malloc(alloc_size_polarity);
 
     irda_tim_tx.stop_semaphore = osSemaphoreNew(1, 0, NULL);
     irda_tim_tx.cycle_duration = 1000000.0 / freq;

firmware/targets/f7/furi_hal/furi_hal_subghz.c

@@ -874,7 +874,7 @@ bool furi_hal_subghz_start_async_tx(FuriHalSubGhzAsyncTxCallback callback, void*
     furi_hal_subghz_async_tx.duty_high = 0;
 
     furi_hal_subghz_async_tx.buffer =
-        furi_alloc(API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
+        malloc(API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL * sizeof(uint32_t));
     furi_hal_subghz_async_tx_refill(
         furi_hal_subghz_async_tx.buffer, API_HAL_SUBGHZ_ASYNC_TX_BUFFER_FULL);
 

firmware/targets/f7/furi_hal/furi_hal_usb_cdc.c

@@ -434,14 +434,14 @@ static void cdc_init(usbd_device* dev, FuriHalUsbInterface* intf) {
 
     char* name = (char*)furi_hal_version_get_device_name_ptr();
     uint8_t len = (name == NULL) ? (0) : (strlen(name));
-    struct usb_string_descriptor* dev_prod_desc = furi_alloc(len * 2 + 2);
+    struct usb_string_descriptor* dev_prod_desc = malloc(len * 2 + 2);
     dev_prod_desc->bLength = len * 2 + 2;
     dev_prod_desc->bDescriptorType = USB_DTYPE_STRING;
     for(uint8_t i = 0; i < len; i++) dev_prod_desc->wString[i] = name[i];
 
     name = (char*)furi_hal_version_get_name_ptr();
     len = (name == NULL) ? (0) : (strlen(name));
-    struct usb_string_descriptor* dev_serial_desc = furi_alloc((len + 5) * 2 + 2);
+    struct usb_string_descriptor* dev_serial_desc = malloc((len + 5) * 2 + 2);
     dev_serial_desc->bLength = (len + 5) * 2 + 2;
     dev_serial_desc->bDescriptorType = USB_DTYPE_STRING;
     memcpy(dev_serial_desc->wString, "f\0l\0i\0p\0_\0", 5 * 2);

firmware/targets/f7/furi_hal/furi_hal_vcp.c

@@ -58,7 +58,7 @@ static const uint8_t ascii_soh = 0x01;
 static const uint8_t ascii_eot = 0x04;
 
 void furi_hal_vcp_init() {
-    vcp = furi_alloc(sizeof(FuriHalVcp));
+    vcp = malloc(sizeof(FuriHalVcp));
     vcp->connected = false;
 
     vcp->tx_stream = xStreamBufferCreate(VCP_TX_BUF_SIZE, 1);

firmware/targets/furi_hal_include/furi_hal.h

@@ -44,3 +44,9 @@ template <unsigned int N> struct STOP_EXTERNING_ME {};
 
 /** Init furi_hal */
 void furi_hal_init();
+
+/**
+ * Init critical parts of furi_hal
+ * That code should not use memory allocations
+ */
+void furi_hal_init_critical();