madvise_preserve_errno.patch (662B)
- # SPDX-FileCopyrightText: 2023 Richard Masters <grick23@gmail.com>
- # SPDX-License-Identifier: MIT
- diff -r -u musl-1.1.24.orig/src/malloc/malloc.c musl-1.1.24/src/malloc/malloc.c
- --- musl-1.1.24/src/malloc/malloc.c 2019-10-13 21:58:27.000000000 +0000
- +++ musl-1.1.24/src/malloc/malloc.c 2023-12-22 23:18:21.088570834 +0000
- @@ -496,7 +496,9 @@
- uintptr_t a = (uintptr_t)self + SIZE_ALIGN+PAGE_SIZE-1 & -PAGE_SIZE;
- uintptr_t b = (uintptr_t)next - SIZE_ALIGN & -PAGE_SIZE;
- #if 1
- + int e = errno;
- __madvise((void *)a, b-a, MADV_DONTNEED);
- + errno = e;
- #else
- __mmap((void *)a, b-a, PROT_READ|PROT_WRITE,
- MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);