From 43f1c8080ae209f41b95a9a390f0596c454b30d9 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Wed, 1 Jan 2014 23:04:25 +0200
Subject: [PATCH] m_realloc: Account only allocation size difference in
total_bytes_allocated.
---
py/malloc.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/py/malloc.c b/py/malloc.c
index c65d38a96..a94edd3fe 100644
--- a/py/malloc.c
+++ b/py/malloc.c
@@ -41,7 +41,12 @@ void *m_realloc(void *ptr, int old_num_bytes, int new_num_bytes) {
printf("could not allocate memory, reallocating %d bytes\n", new_num_bytes);
return NULL;
}
- total_bytes_allocated += new_num_bytes;
+ // 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.
+ total_bytes_allocated += new_num_bytes - old_num_bytes;
return ptr;
}
--
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