2004-08-24 Steven G. Johnson <stevenj@alum.mit.edu>

	* mingwex/mingw-aligned-malloc.c: New file.
	* mingwex/tst-aligned-malloc.c: New file.

1 files changed, 90 insertions, 0 deletions

diff --git a/winsup/mingw/mingwex/tst-aligned-malloc.c b/winsup/mingw/mingwex/tst-aligned-malloc.c
new file mode 100755
index 000000000..43ee734bc
--- /dev/null
+++ b/winsup/mingw/mingwex/tst-aligned-malloc.c
@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <errno.h>
+#include <malloc.h>
+
+#ifdef HAVE_STDINT_H
+#  include <stdint.h>		/* uintptr_t */
+#else
+#  define uintptr_t size_t
+#endif
+
+#define NELEM(a) (sizeof(a) / sizeof(a[0]))
+
+static int
+is_aligned (void *p, size_t alignment, size_t offset)
+{
+  return !((((uintptr_t) p) + offset) & (alignment - 1));
+}
+
+#define MAX_SIZE (1 << sizeof(unsigned char))
+#define NP 1000
+#define NTST 100000U
+
+#define ERRMSG fprintf(stderr, "Iteration %u, align = %u, offset = %u, size = %u (oldsize = %u), errno = %d (%s)\n", i, align[j % NELEM(align)], offset[j % NELEM(offset)], size[j], oldsize, errno, strerror(errno))
+
+int
+main (void)
+{
+  unsigned char *p[NP];
+  size_t size[NP];
+  size_t align[] = { 2, 4, 8, 16, 32, 64 };
+  size_t offset[20];
+  unsigned i;
+
+  srand (time (NULL));
+
+  for (i = 0; i < NELEM (p); ++i)
+    {
+      p[i] = 0;
+      size[i] = 0;
+    }
+
+  for (i = 0; i < NELEM (offset); ++i)
+    offset[i] = rand () % 512;
+
+  for (i = 0; i < NTST; ++i)
+    {
+      size_t oldsize;
+      unsigned j, k;
+      j = rand () % NELEM (p);
+      oldsize = size[j];
+      p[j] = __mingw_aligned_offset_realloc (p[j],
+					     size[j] = rand () % MAX_SIZE,
+					     align[j % NELEM (align)],
+					     offset[j % NELEM (offset)]);
+
+      if (size[j] && !p[j])
+	{
+	  fprintf (stderr, "Returned NULL!\n");
+	  ERRMSG;
+	  return EXIT_FAILURE;
+	}
+      if (size[j] && !is_aligned (p[j],
+				  align[j % NELEM (align)],
+				  offset[j % NELEM (offset)]))
+	{
+	  fprintf (stderr, "Misaligned block!\n");
+	  ERRMSG;
+	  return EXIT_FAILURE;
+	}
+      if (oldsize > size[j])
+	oldsize = size[j];
+      for (k = 0; k < oldsize; ++k)
+	if (p[j][k] != k)
+	  {
+	    fprintf (stderr, "Miscopied block!\n");
+	    ERRMSG;
+	    return EXIT_FAILURE;
+	  }
+      for (k = 0; k < size[j]; ++k)
+	p[j][k] = k;
+    }
+
+  for (i = 0; i < NELEM (p); ++i)
+    __mingw_aligned_free (p[i]);
+
+  return EXIT_SUCCESS;
+}