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-rw-r--r--multilib-testing/lib32-glibc/glibc-2.15-arena.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/multilib-testing/lib32-glibc/glibc-2.15-arena.patch b/multilib-testing/lib32-glibc/glibc-2.15-arena.patch
new file mode 100644
index 000000000..46f52e98d
--- /dev/null
+++ b/multilib-testing/lib32-glibc/glibc-2.15-arena.patch
@@ -0,0 +1,29 @@
+diff --git a/malloc/arena.c b/malloc/arena.c
+index d3cf4b9..b1c9469 100644
+--- a/malloc/arena.c
++++ b/malloc/arena.c
+@@ -828,7 +828,7 @@ arena_get2(mstate a_tsd, size_t size)
+ {
+ if (mp_.arena_max != 0)
+ narenas_limit = mp_.arena_max;
+- else
++ else if (narenas > mp_.arena_test)
+ {
+ int n = __get_nprocs ();
+
+@@ -842,7 +842,14 @@ arena_get2(mstate a_tsd, size_t size)
+ }
+ repeat:;
+ size_t n = narenas;
+- if (__builtin_expect (n <= mp_.arena_test || n < narenas_limit, 0))
++ /* NB: the following depends on the fact that (size_t)0 - 1 is a
++ very large number and that the underflow is OK. If arena_max
++ is set the value of arena_test is irrelevant. If arena_test
++ is set but narenas is not yet larger or equal to arena_test
++ narenas_limit is 0. There is no possibility for narenas to
++ be too big for the test to always fail since there is not
++ enough address space to create that many arenas. */
++ if (__builtin_expect (n <= narenas_limit - 1, 0))
+ {
+ if (catomic_compare_and_exchange_bool_acq (&narenas, n + 1, n))
+ goto repeat;