diff options
| author | Carlos Eduardo Seo <carlos.seo@arm.com> | 2022-01-26 16:00:13 -0300 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2022-11-22 14:24:26 +0000 |
| commit | 17034ac2bf79f415150b5b32b0e2bf24b8636267 (patch) | |
| tree | 39193655d0f5bb1426fc324ea6d134db5678222c | |
| parent | 13de83e5cfee8c5f79e04e10e22b88959481e50b (diff) | |
| download | glibc-17034ac2bf79f415150b5b32b0e2bf24b8636267.tar.gz glibc-17034ac2bf79f415150b5b32b0e2bf24b8636267.tar.xz glibc-17034ac2bf79f415150b5b32b0e2bf24b8636267.zip | |
malloc: Use uintptr_t for pointer alignment
Avoid integer casts that assume unsigned long can represent pointers.
| -rw-r--r-- | malloc/arena.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/malloc/arena.c b/malloc/arena.c index 0a684a720d..b1f5b4117f 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -444,7 +444,7 @@ dump_heap (heap_info *heap) fprintf (stderr, "Heap %p, size %10lx:\n", heap, (long) heap->size); ptr = (heap->ar_ptr != (mstate) (heap + 1)) ? (char *) (heap + 1) : (char *) (heap + 1) + sizeof (struct malloc_state); - p = (mchunkptr) (((unsigned long) ptr + MALLOC_ALIGN_MASK) & + p = (mchunkptr) (((uintptr_t) ptr + MALLOC_ALIGN_MASK) & ~MALLOC_ALIGN_MASK); for (;; ) { @@ -518,7 +518,7 @@ alloc_new_heap (size_t size, size_t top_pad, size_t pagesize, p1 = (char *) MMAP (0, max_size << 1, PROT_NONE, mmap_flags); if (p1 != MAP_FAILED) { - p2 = (char *) (((unsigned long) p1 + (max_size - 1)) + p2 = (char *) (((uintptr_t) p1 + (max_size - 1)) & ~(max_size - 1)); ul = p2 - p1; if (ul) @@ -760,7 +760,7 @@ _int_new_arena (size_t size) /* Set up the top chunk, with proper alignment. */ ptr = (char *) (a + 1); - misalign = (unsigned long) chunk2mem (ptr) & MALLOC_ALIGN_MASK; + misalign = (uintptr_t) chunk2mem (ptr) & MALLOC_ALIGN_MASK; if (misalign > 0) ptr += MALLOC_ALIGNMENT - misalign; top (a) = (mchunkptr) ptr; |