From 6ff264ee05cc8fd6b2c796623eadb8662444a458 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <rene.scharfe@lsrfire.ath.cx>
Date: Tue, 6 Mar 2012 20:37:23 +0100
Subject: unpack-trees: plug minor memory leak
The allocations made by unpack_nondirectories() using create_ce_entry()
are never freed.
In the non-merge case, we duplicate them using add_entry() and later
only look at the first allocated element (src[0]), perhaps even only
by mistake. Split out the actual addition from add_entry() into the
new helper do_add_entry() and call this non-duplicating function
instead of add_entry() to avoid the leak.
Valgrind reports this for the command "git archive v1.7.9" without
the patch:
==13372== LEAK SUMMARY:
==13372== definitely lost: 230,986 bytes in 2,325 blocks
==13372== indirectly lost: 0 bytes in 0 blocks
==13372== possibly lost: 98 bytes in 1 blocks
==13372== still reachable: 2,259,198 bytes in 3,243 blocks
==13372== suppressed: 0 bytes in 0 blocks
And with the patch applied:
==13375== LEAK SUMMARY:
==13375== definitely lost: 65 bytes in 1 blocks
==13375== indirectly lost: 0 bytes in 0 blocks
==13375== possibly lost: 0 bytes in 0 blocks
==13375== still reachable: 2,364,417 bytes in 3,245 blocks
==13375== suppressed: 0 bytes in 0 blocks
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
unpack-trees.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/unpack-trees.c b/unpack-trees.c
index 60b728e495..36523da22a 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -102,21 +102,28 @@ void setup_unpack_trees_porcelain(struct unpack_trees_options *opts,
opts->unpack_rejects[i].strdup_strings = 1;
}
-static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
- unsigned int set, unsigned int clear)
+static void do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
+ unsigned int set, unsigned int clear)
{
- unsigned int size = ce_size(ce);
- struct cache_entry *new = xmalloc(size);
-
clear |= CE_HASHED | CE_UNHASHED;
if (set & CE_REMOVE)
set |= CE_WT_REMOVE;
+ ce->next = NULL;
+ ce->ce_flags = (ce->ce_flags & ~clear) | set;
+ add_index_entry(&o->result, ce,
+ ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
+}
+
+static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
+ unsigned int set, unsigned int clear)
+{
+ unsigned int size = ce_size(ce);
+ struct cache_entry *new = xmalloc(size);
+
memcpy(new, ce, size);
- new->next = NULL;
- new->ce_flags = (new->ce_flags & ~clear) | set;
- add_index_entry(&o->result, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
+ do_add_entry(o, new, set, clear);
}
/*
@@ -587,7 +594,7 @@ static int unpack_nondirectories(int n, unsigned long mask,
for (i = 0; i < n; i++)
if (src[i] && src[i] != o->df_conflict_entry)
- add_entry(o, src[i], 0, 0);
+ do_add_entry(o, src[i], 0, 0);
return 0;
}
--
cgit v1.2.1