Add RM_MallocSizeString, RM_MallocSizeDict (#10542)

Add APIs to allow modules to compute the memory consumption of opaque objects owned by redis.
Without these, the mem_usage callbacks of module data types are useless in many cases.

Other changes:
Fix streamRadixTreeMemoryUsage to include the size of the rax structure itself

1 files changed, 1 insertions, 1 deletions

diff --git a/src/object.c b/src/object.c
index a60a27e90..093e2619e 100644
--- a/src/object.c
+++ b/src/object.c
@@ -958,7 +958,7 @@ char *strEncoding(int encoding) {
  * on the insertion speed and thus the ability of the radix tree
  * to compress prefixes. */
 size_t streamRadixTreeMemoryUsage(rax *rax) {
-    size_t size;
+    size_t size = sizeof(*rax);
     size = rax->numele * sizeof(streamID);
     size += rax->numnodes * sizeof(raxNode);
     /* Add a fixed overhead due to the aux data pointer, children, ... */