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-rw-r--r--malloc/malloc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 722b1d4961..b067b65bdc 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3168,6 +3168,10 @@ static Void_t* sYSMALLOc(nb, av) INTERNAL_SIZE_T nb; mstate av;
 
   size = nb + mp_.top_pad + MINSIZE;
 
+#define TWOM (2*1024*1024)
+  char *cur = (char*)MORECORE(0);
+  size = (char*)((size_t)(cur + size + TWOM - 1)&~(TWOM-1))-cur;
+
   /*
     If contiguous, we can subtract out existing space that we hope to
     combine with new space. We add it back later only if