glibc/malloc/tst-scratch_buffer.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

178 lines
4.8 KiB
C

/*
Copyright (C) 2015-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <scratch_buffer.h>
#include <support/check.h>
#include <support/support.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
static bool
unchanged_array_size (struct scratch_buffer *buf, size_t a, size_t b)
{
size_t old_length = buf->length;
if (!scratch_buffer_set_array_size (buf, a, b))
{
printf ("scratch_buffer_set_array_size failed: %zu %zu\n",
a, b);
return false;
}
if (old_length != buf->length)
{
printf ("scratch_buffer_set_array_size did not preserve size: %zu %zu\n",
a, b);
return false;
}
return true;
}
static bool
array_size_must_fail (size_t a, size_t b)
{
for (int pass = 0; pass < 2; ++pass)
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
if (pass > 0)
if (!scratch_buffer_grow (&buf))
{
printf ("scratch_buffer_grow in array_size_must_fail failed\n");
return false;
}
if (scratch_buffer_set_array_size (&buf, a, b))
{
printf ("scratch_buffer_set_array_size passed: %d %zu %zu\n",
pass, a, b);
return false;
}
if (buf.data != buf.__space.__c)
{
printf ("scratch_buffer_set_array_size did not free: %d %zu %zu\n",
pass, a, b);
return false;
}
}
return true;
}
static int
do_test (void)
{
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, ' ', buf.length);
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, ' ', buf.length);
size_t old_length = buf.length;
scratch_buffer_grow (&buf);
if (buf.length <= old_length)
{
printf ("scratch_buffer_grow did not enlarge buffer\n");
return 1;
}
memset (buf.data, ' ', buf.length);
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, '@', buf.length);
strcpy (buf.data, "prefix");
size_t old_length = buf.length;
scratch_buffer_grow_preserve (&buf);
if (buf.length <= old_length)
{
printf ("scratch_buffer_grow_preserve did not enlarge buffer\n");
return 1;
}
if (strcmp (buf.data, "prefix") != 0)
{
printf ("scratch_buffer_grow_preserve did not copy buffer\n");
return 1;
}
for (unsigned i = 7; i < old_length; ++i)
if (((char *)buf.data)[i] != '@')
{
printf ("scratch_buffer_grow_preserve did not copy buffer (%u)\n",
i);
return 1;
}
scratch_buffer_free (&buf);
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
for (int pass = 0; pass < 4; ++pass)
{
if (!(unchanged_array_size (&buf, 0, 0)
&& unchanged_array_size (&buf, 1, 0)
&& unchanged_array_size (&buf, 0, 1)
&& unchanged_array_size (&buf, -1, 0)
&& unchanged_array_size (&buf, 0, -1)
&& unchanged_array_size (&buf, 1ULL << 16, 0)
&& unchanged_array_size (&buf, 0, 1ULL << 16)
&& unchanged_array_size (&buf, (size_t) (1ULL << 32), 0)
&& unchanged_array_size (&buf, 0, (size_t) (1ULL << 32))))
return 1;
if (!scratch_buffer_grow (&buf))
{
printf ("scratch_buffer_grow_failed (pass %d)\n", pass);
}
}
scratch_buffer_free (&buf);
}
{
if (!(array_size_must_fail (-1, 1)
&& array_size_must_fail (-1, -1)
&& array_size_must_fail (1, -1)
&& array_size_must_fail (((size_t)-1) / 4, 4)
&& array_size_must_fail (4, ((size_t)-1) / 4)))
return 1;
}
{
struct scratch_buffer buf;
scratch_buffer_init (&buf);
memset (buf.data, '@', buf.length);
size_t sizes[] = { 16, buf.length, buf.length + 16 };
for (int i = 0; i < array_length (sizes); i++)
{
/* The extra size is unitialized through realloc. */
size_t l = sizes[i] > buf.length ? sizes[i] : buf.length;
void *r = scratch_buffer_dupfree (&buf, l);
void *c = xmalloc (l);
memset (c, '@', l);
TEST_COMPARE_BLOB (r, l, buf.data, l);
free (r);
free (c);
}
scratch_buffer_free (&buf);
}
return 0;
}
#include <support/test-driver.c>