py: Add MICROPY_PY_MICROPYTHON_MEM_INFO to enable mem-info funcs.

This allows to enable mem-info functions in micropython module, even if
MICROPY_MEM_STATS is not enabled.  In this case, you get mem_info and
qstr_info but not mem_{total,current,peak}.

py/modmicropython.c

@@ -26,6 +26,7 @@
 
 #include <stdio.h>
 
+#include "py/mpstate.h"
 #include "py/builtin.h"
 #include "py/stackctrl.h"
 #include "py/gc.h"
@@ -33,6 +34,8 @@
 // Various builtins specific to MicroPython runtime,
 // living in micropython module
 
+#if MICROPY_PY_MICROPYTHON_MEM_INFO
+
 #if MICROPY_MEM_STATS
 STATIC mp_obj_t mp_micropython_mem_total() {
     return MP_OBJ_NEW_SMALL_INT(m_get_total_bytes_allocated());
@@ -48,11 +51,18 @@ STATIC mp_obj_t mp_micropython_mem_peak() {
     return MP_OBJ_NEW_SMALL_INT(m_get_peak_bytes_allocated());
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mp_micropython_mem_peak_obj, mp_micropython_mem_peak);
+#endif
 
 mp_obj_t mp_micropython_mem_info(mp_uint_t n_args, const mp_obj_t *args) {
+#if MICROPY_MEM_STATS
     printf("mem: total=" UINT_FMT ", current=" UINT_FMT ", peak=" UINT_FMT "\n",
         m_get_total_bytes_allocated(), m_get_current_bytes_allocated(), m_get_peak_bytes_allocated());
+#endif
+#if MICROPY_STACK_CHECK
+    printf("stack: " UINT_FMT " out of " INT_FMT "\n", mp_stack_usage(), MP_STATE_VM(stack_limit) - mp_stack_usage());
+#else
     printf("stack: " UINT_FMT "\n", mp_stack_usage());
+#endif
 #if MICROPY_ENABLE_GC
     gc_dump_info();
     if (n_args == 1) {
@@ -72,7 +82,8 @@ STATIC mp_obj_t qstr_info(void) {
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mp_micropython_qstr_info_obj, qstr_info);
-#endif
+
+#endif // MICROPY_PY_MICROPYTHON_MEM_INFO
 
 #if MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF && (MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE == 0)
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_alloc_emergency_exception_buf_obj, mp_alloc_emergency_exception_buf);
@@ -80,10 +91,12 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_alloc_emergency_exception_buf_obj, mp_alloc_
 
 STATIC const mp_map_elem_t mp_module_micropython_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_micropython) },
+#if MICROPY_PY_MICROPYTHON_MEM_INFO
 #if MICROPY_MEM_STATS
     { MP_OBJ_NEW_QSTR(MP_QSTR_mem_total), (mp_obj_t)&mp_micropython_mem_total_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_mem_current), (mp_obj_t)&mp_micropython_mem_current_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_mem_peak), (mp_obj_t)&mp_micropython_mem_peak_obj },
+#endif
     { MP_OBJ_NEW_QSTR(MP_QSTR_mem_info), (mp_obj_t)&mp_micropython_mem_info_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_qstr_info), (mp_obj_t)&mp_micropython_qstr_info_obj },
 #endif

py/mpconfig.h

@@ -369,6 +369,11 @@ typedef double mp_float_t;
 #define MICROPY_PY___FILE__ (1)
 #endif
 
+// Whether to provide mem-info related functions in micropython module
+#ifndef MICROPY_PY_MICROPYTHON_MEM_INFO
+#define MICROPY_PY_MICROPYTHON_MEM_INFO (0)
+#endif
+
 // Whether to provide "array" module. Note that large chunk of the
 // underlying code is shared with "bytearray" builtin type, so to
 // get real savings, it should be disabled too.

py/qstrdefs.h

@@ -363,10 +363,12 @@ Q(polar)
 Q(rect)
 #endif
 
+#if MICROPY_PY_MICROPYTHON_MEM_INFO
 #if MICROPY_MEM_STATS
 Q(mem_total)
 Q(mem_current)
 Q(mem_peak)
+#endif
 Q(mem_info)
 Q(qstr_info)
 #endif

stmhal/mpconfigport.h

@@ -57,6 +57,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
 #define MICROPY_PY_BUILTINS_FROZENSET (1)
 #define MICROPY_PY_BUILTINS_EXECFILE (1)
+#define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_SYS_EXIT         (1)
 #define MICROPY_PY_SYS_STDFILES     (1)
 #define MICROPY_PY_CMATH            (1)

unix/mpconfigport.h

@@ -57,6 +57,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
 #define MICROPY_PY_BUILTINS_FROZENSET (1)
 #define MICROPY_PY_BUILTINS_COMPILE (1)
+#define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_SYS_EXIT         (1)
 #define MICROPY_PY_SYS_PLATFORM     "linux"
 #define MICROPY_PY_SYS_MAXSIZE      (1)