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Date: Wed, 21 Nov 2018 23:17:21 +1100
From: Peter Ross <pross AT xvid DOT org>
To: djgpp-workers AT delorie DOT com
Subject: memalign broken (again)
Message-ID: <20181121121721.GA1501@b21e7fa156c1e52f6cc3a9e0ddf22975>
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hi,

djgpp memalign still fails when:

	1. alignment is >= 16 bytes
	2. some sequence of memory allocations have already occured.

the test case below is reproducible with djgpp cvs and 2.05+nmemalign.patch
(patch was found here: https://aur.archlinux.org/cgit/aur.git/tree/nmemalign.patch?h=dosbox-djcrx)

tested using freedos 1.2 on physical hardware.

---
#include <stdio.h>
#include <malloc.h>

#define TEST(alignment, size) \
        printf("memalign(%d,%d)=", alignment, size); \
        ptr = memalign(alignment, size); \
        printf("%p\n", ptr);

int main()
{
    void * ptr;
    TEST(1, 46)
    TEST(4, 583)
    TEST(64, 773)
    TEST(32, 889)  /* <-- reliably fails here */
    return 0;
}
---

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)

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