Add qstr_info() function and bindings for unix port.

py/qstr.c

@@ -185,3 +185,19 @@ const byte *qstr_data(qstr q, uint *len) {
     *len = Q_GET_LENGTH(qd);
     return Q_GET_DATA(qd);
 }
+
+void qstr_pool_info(uint *n_pool, uint *n_qstr, uint *n_str_data_bytes, uint *n_total_bytes) {
+    *n_pool = 0;
+    *n_qstr = 0;
+    *n_str_data_bytes = 0;
+    *n_total_bytes = 0;
+    for (qstr_pool_t *pool = last_pool; pool != NULL && pool != &const_pool; pool = pool->prev) {
+        *n_pool += 1;
+        *n_qstr += pool->len;
+        for (const byte **q = pool->qstrs, **q_top = pool->qstrs + pool->len; q < q_top; q++) {
+            *n_str_data_bytes += Q_GET_ALLOC(*q);
+        }
+        *n_total_bytes += sizeof(qstr_pool_t) + sizeof(qstr) * pool->alloc;
+    }
+    *n_total_bytes += *n_str_data_bytes;
+}

py/qstr.h

@@ -36,3 +36,5 @@ machine_uint_t qstr_hash(qstr q);
 const char* qstr_str(qstr q);
 uint qstr_len(qstr q);
 const byte* qstr_data(qstr q, uint *len);
+
+void qstr_pool_info(uint *n_pool, uint *n_qstr, uint *n_str_data_bytes, uint *n_total_bytes);

unix/main.c

@@ -216,6 +216,18 @@ int usage(void) {
     return 1;
 }
 
+mp_obj_t mem_info(void) {
+    printf("mem: total=%d, current=%d, peak=%d\n", m_get_total_bytes_allocated(), m_get_current_bytes_allocated(), m_get_peak_bytes_allocated());
+    return mp_const_none;
+}
+
+mp_obj_t qstr_info(void) {
+    uint n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
+    qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
+    printf("qstr pool: n_pool=%u, n_qstr=%u, n_str_data_bytes=%u, n_total_bytes=%u\n", n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
+    return mp_const_none;
+}
+
 int main(int argc, char **argv) {
     qstr_init();
     rt_init();
@@ -225,6 +237,8 @@ int main(int argc, char **argv) {
     rt_store_attr(m_sys, MP_QSTR_argv, py_argv);
 
     rt_store_name(qstr_from_str("test"), test_obj_new(42));
+    rt_store_name(qstr_from_str("mem_info"), rt_make_function_n(0, mem_info));
+    rt_store_name(qstr_from_str("qstr_info"), rt_make_function_n(0, qstr_info));
 
     file_init();
     rawsocket_init();