py: Check explicitly for memory allocation failure in parser.
Previously, a failed malloc/realloc would throw an exception, which was
not caught. I think it's better to keep the parser free from NLR
(exception throwing), hence this patch.
diff --git a/py/malloc.c b/py/malloc.c
index 1d18a9a..db2578d 100644
--- a/py/malloc.c
+++ b/py/malloc.c
@@ -118,6 +118,26 @@
return new_ptr;
}
+void *m_realloc_maybe(void *ptr, int old_num_bytes, int new_num_bytes) {
+ void *new_ptr = realloc(ptr, new_num_bytes);
+ if (new_ptr == NULL) {
+ return NULL;
+ }
+#if MICROPY_MEM_STATS
+ // At first thought, "Total bytes allocated" should only grow,
+ // after all, it's *total*. But consider for example 2K block
+ // shrunk to 1K and then grown to 2K again. It's still 2K
+ // allocated total. If we process only positive increments,
+ // we'll count 3K.
+ int diff = new_num_bytes - old_num_bytes;
+ total_bytes_allocated += diff;
+ current_bytes_allocated += diff;
+ UPDATE_PEAK();
+#endif
+ DEBUG_printf("realloc %p, %d, %d : %p\n", ptr, old_num_bytes, new_num_bytes, new_ptr);
+ return new_ptr;
+}
+
void m_free(void *ptr, int num_bytes) {
if (ptr != NULL) {
free(ptr);