Expose memory stats functions via "micropython" module.

These are micropython.mem_total(), .mem_current(), .mem_peak(). These are 3
individual functions with simple scalar return value to make sure that
calls to these functions themselves have minimal (hopefully zero) impact on
memory allocation.

1 files changed, 8 insertions, 5 deletions

diff --git a/py/runtime.c b/py/runtime.c
index 830bcc6aa8..09e4237aff 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -153,15 +153,18 @@ void rt_init(void) {
     mp_map_add_qstr(&map_builtins, MP_QSTR_bytearray, (mp_obj_t)&mp_builtin_bytearray_obj);
 
 #if MICROPY_CPYTHON_COMPAT
-    // Add (empty) micropython module, so it was possible to "import micropython",
-    // which can be a placeholder module on CPython.
-    mp_obj_t m_mp = mp_obj_new_module(qstr_from_str_static("micropython"));
-    rt_store_name(qstr_from_str_static("micropython"), m_mp);
-
     // Precreate sys module, so "import sys" didn't throw exceptions.
     mp_obj_new_module(qstr_from_str_static("sys"));
 #endif
 
+    mp_obj_t m_mp = mp_obj_new_module(qstr_from_str_static("micropython"));
+    rt_store_name(qstr_from_str_static("micropython"), m_mp);
+#if MICROPY_MEM_STATS
+    rt_store_attr(m_mp, qstr_from_str_static("mem_total"), (mp_obj_t)&mp_builtin_mem_total_obj);
+    rt_store_attr(m_mp, qstr_from_str_static("mem_current"), (mp_obj_t)&mp_builtin_mem_current_obj);
+    rt_store_attr(m_mp, qstr_from_str_static("mem_peak"), (mp_obj_t)&mp_builtin_mem_peak_obj);
+#endif
+
     next_unique_code_id = 1; // 0 indicates "no code"
     unique_codes_alloc = 0;
     unique_codes = NULL;