page-align initial brk value used by malloc in shared libc

[musl] / src / malloc / malloc.c

diff --git a/src/malloc/malloc.c b/src/malloc/malloc.c
index 88a31ae..1a6d149 100644 (file)
--- a/src/malloc/malloc.c
+++ b/src/malloc/malloc.c
@@ -196,7 +196,11 @@ static int init_malloc(size_t n)
                return 0;
        }
 
-       mal.brk = __brk(0) + 2*SIZE_ALIGN-1 & -SIZE_ALIGN;
+       mal.brk = __brk(0);
+#ifdef SHARED
+       mal.brk = mal.brk + PAGE_SIZE-1 & -PAGE_SIZE;
+#endif
+       mal.brk = mal.brk + 2*SIZE_ALIGN-1 & -SIZE_ALIGN;
 
        c = expand_heap(n);