code review 5949043: realloc: bug, realloc does not update tailptr. (issue 5949043)

[enrique...@gmail.com]

Reviewers: Nixie,

Message:
Hello nixi...@gmail.com (cc: nix...@googlegroups.com),

I'd like you to review this change to
https://code.google.com/p/nix-os/

Description:
realloc: bug, realloc does not update tailptr.

Please review this at http://codereview.appspot.com/5949043/

Affected files:
M sys/src/nix/k10/qmalloc.c

Index: sys/src/nix/k10/qmalloc.c
===================================================================
--- a/sys/src/nix/k10/qmalloc.c
+++ b/sys/src/nix/k10/qmalloc.c
@@ -592,12 +592,14 @@
if(ounits > nunits){
p->s.size = nunits;
tailsize += ounits-nunits;
+ tailptr -= ounits-nunits;
MUNLOCK;
return ap;
}
if(tailsize >= nunits-ounits){
p->s.size = nunits;
tailsize -= nunits-ounits;
+ tailptr += nunits-ounits;
MUNLOCK;
return ap;
}

[John Floren]

LGTM

[Gorka Guardiola]

Lgtm