pybricks.common.system: Add umm_info() function.

Add a umm_info() to print debug info about umm memory usage similar to
micropython.mem_info(). This is used on EV3 for allocating memory for
images.

Author: dlech

bricks/ev3/dbglog/dbglog.h

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: MIT
+// Copyright (c) 2025 The Pybricks Authors
+//
+// Hack to allow umm_info() to print in MicroPython.
+
+#include "py/mpprint.h"
+
+#undef DBGLOG_FORCE
+#define DBGLOG_FORCE(force, fmt, ...) mp_printf(&mp_plat_print, fmt,##__VA_ARGS__)
+
+#define DBGLOG_32_BIT_PTR(p) (p)

bricks/ev3/mpconfigport.h

@@ -25,6 +25,7 @@
 #define PYBRICKS_PY_COMMON_MOTORS               (1)
 #define PYBRICKS_PY_COMMON_SPEAKER              (1)
 #define PYBRICKS_PY_COMMON_SYSTEM               (1)
+#define PYBRICKS_PY_COMMON_SYSTEM_UMM_INFO      (1)
 #define PYBRICKS_PY_EV3DEVICES                  (1)
 #define PYBRICKS_PY_EXPERIMENTAL                (1)
 #define PYBRICKS_PY_HUBS                        (1)

lib/pbio/platform/ev3/umm_malloc_cfgport.h

@@ -7,3 +7,6 @@
 // We only use this for large allocations, like images and we have a lot of RAM
 // on the EV3, so we can use a larger block size to reduce overhead.
 #define UMM_BLOCK_BODY_SIZE 256
+
+#define UMM_INFO
+#define DBGLOG_ENABLE

pybricks/common/pb_type_system.c

@@ -150,6 +150,20 @@ static MP_DEFINE_CONST_FUN_OBJ_0(pb_type_System_reset_storage_obj, pb_type_Syste
 
 #endif // PBIO_CONFIG_ENABLE_SYS
 
+#if PYBRICKS_PY_COMMON_SYSTEM_UMM_INFO
+
+// Not in library header for some reason.
+extern void *umm_info(void *ptr, bool force);
+
+// Prints out umm usage similar to micropython.mem_info().
+static mp_obj_t pb_type_System_umm_info(void) {
+    umm_info(NULL, false);
+    return mp_const_none;
+}
+static MP_DEFINE_CONST_FUN_OBJ_0(pb_type_System_umm_info_obj, pb_type_System_umm_info);
+
+#endif // PYBRICKS_PY_COMMON_SYSTEM_UMM_INFO
+
 // dir(pybricks.common.System)
 static const mp_rom_map_elem_t common_System_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_name), MP_ROM_PTR(&pb_type_System_name_obj) },
@@ -163,6 +177,9 @@ static const mp_rom_map_elem_t common_System_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_shutdown), MP_ROM_PTR(&pb_type_System_shutdown_obj) },
     { MP_ROM_QSTR(MP_QSTR_storage), MP_ROM_PTR(&pb_type_System_storage_obj) },
     #endif
+    #if PYBRICKS_PY_COMMON_SYSTEM_UMM_INFO
+    { MP_ROM_QSTR(MP_QSTR_umm_info), MP_ROM_PTR(&pb_type_System_umm_info_obj) },
+    #endif
 };
 static MP_DEFINE_CONST_DICT(common_System_locals_dict, common_System_locals_dict_table);