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glibc/malloc/tst-dynarray.c
Joseph Myers 7ca9377bab Disable -Waggressive-loop-optimizations warnings in tst-dynarray.c 
My build-many-glibcs.py bot shows -Waggressive-loop-optimizations
errors building the glibc testsuite for 32-bit architectures with GCC
mainline, which seem to have appeared between GCC commits
4abc0c196b10251dc80d0743ba9e8ab3e56c61ed and
d8edfadfc7a9795b65177a50ce44fd348858e844:

In function 'dynarray_long_noscratch_resize',
    inlined from 'test_long_overflow' at tst-dynarray.c:489:5,
    inlined from 'do_test' at tst-dynarray.c:571:3:
../malloc/dynarray-skeleton.c:391:36: error: iteration 1073741823 invokes undefined behavior [-Werror=aggressive-loop-optimizations]
  391 |             DYNARRAY_ELEMENT_INIT (&list->u.dynarray_header.array[i]);
tst-dynarray.c:39:37: note: in definition of macro 'DYNARRAY_ELEMENT_INIT'
   39 | #define DYNARRAY_ELEMENT_INIT(e) (*(e) = 23)
      |                                     ^
In file included from tst-dynarray.c:42:
../malloc/dynarray-skeleton.c:389:37: note: within this loop
  389 |         for (size_t i = old_size; i < size; ++i)
      |                                   ~~^~~~~~
In function 'dynarray_long_resize',
    inlined from 'test_long_overflow' at tst-dynarray.c:479:5,
    inlined from 'do_test' at tst-dynarray.c:571:3:
../malloc/dynarray-skeleton.c:391:36: error: iteration 1073741823 invokes undefined behavior [-Werror=aggressive-loop-optimizations]
  391 |             DYNARRAY_ELEMENT_INIT (&list->u.dynarray_header.array[i]);
tst-dynarray.c:27:37: note: in definition of macro 'DYNARRAY_ELEMENT_INIT'
   27 | #define DYNARRAY_ELEMENT_INIT(e) (*(e) = 17)
      |                                     ^
In file included from tst-dynarray.c:28:
../malloc/dynarray-skeleton.c:389:37: note: within this loop
  389 |         for (size_t i = old_size; i < size; ++i)
      |                                   ~~^~~~~~

I don't know what GCC change made these errors appear, or why they
only appear for 32-bit architectures.  However, the warnings appear to
be both true (that iteration would indeed involve undefined behavior
if executed) and useless in this particular case (that iteration is
never executed, because the allocation size overflows and so the
allocation fails - but the check for allocation size overflow is in a
separate source file and so can't be seen by the compiler when
compiling this test).  So use the DIAG_* macros to disable
-Waggressive-loop-optimizations around the calls in question to
dynarray_long_resize and dynarray_long_noscratch_resize in this test.

Tested with build-many-glibcs.py (GCC mainline) for arm-linux-gnueabi,
where it restores a clean testsuite build.
2021-10-29 14:40:45 +00:00

592 lines
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/* Test for dynamic arrays.
Copyright (C) 2017-2021 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 "tst-dynarray-shared.h"
#include <errno.h>
#include <stdint.h>
#include <libc-diag.h>
#define DYNARRAY_STRUCT dynarray_long
#define DYNARRAY_ELEMENT long
#define DYNARRAY_PREFIX dynarray_long_
#define DYNARRAY_ELEMENT_INIT(e) (*(e) = 17)
#include <malloc/dynarray-skeleton.c>
struct long_array
{
long *array;
size_t length;
};
#define DYNARRAY_STRUCT dynarray_long_noscratch
#define DYNARRAY_ELEMENT long
#define DYNARRAY_PREFIX dynarray_long_noscratch_
#define DYNARRAY_ELEMENT_INIT(e) (*(e) = 23)
#define DYNARRAY_FINAL_TYPE struct long_array
#define DYNARRAY_INITIAL_SIZE 0
#include <malloc/dynarray-skeleton.c>
#define DYNARRAY_STRUCT zstr
#define DYNARRAY_ELEMENT char
#define DYNARRAY_PREFIX zstr_
#define DYNARRAY_INITIAL_SIZE 128
#include <malloc/dynarray-skeleton.c>
#include <malloc.h>
#include <mcheck.h>
#include <stdint.h>
#include <support/check.h>
#include <support/support.h>
enum { max_count = 20 };
/* Test dynamic arrays with int elements (no automatic deallocation
for elements). */
static void
test_int (void)
{
/* Empty array. */
{
struct dynarray_int dyn;
dynarray_int_init (&dyn);
CHECK_EMPTY (int, &dyn);
}
/* Empty array with finalization. */
{
struct dynarray_int dyn;
dynarray_int_init (&dyn);
CHECK_INIT_STATE (int, &dyn);
struct int_array result = { (int *) (uintptr_t) -1, -1 };
TEST_VERIFY_EXIT (dynarray_int_finalize (&dyn, &result));
CHECK_INIT_STATE (int, &dyn);
TEST_VERIFY_EXIT (result.array == NULL);
TEST_VERIFY_EXIT (result.length == 0);
}
/* Non-empty array tests.
do_add: Switch between emplace (false) and add (true).
do_finalize: Perform finalize call at the end.
do_clear: Perform clear call at the end.
do_remove_last: Perform remove_last call after adding elements.
count: Number of elements added to the array. */
for (int do_add = 0; do_add < 2; ++do_add)
for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
for (int do_clear = 0; do_clear < 2; ++do_clear)
for (int do_remove_last = 0; do_remove_last < 2; ++do_remove_last)
for (unsigned int count = 0; count < max_count; ++count)
{
if (do_remove_last && count == 0)
continue;
unsigned int base = count * count;
struct dynarray_int dyn;
dynarray_int_init (&dyn);
for (unsigned int i = 0; i < count; ++i)
{
if (do_add)
dynarray_int_add (&dyn, base + i);
else
{
int *place = dynarray_int_emplace (&dyn);
TEST_VERIFY_EXIT (place != NULL);
*place = base + i;
}
TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == i + 1);
TEST_VERIFY_EXIT (dynarray_int_size (&dyn)
<= dyn.u.dynarray_header.allocated);
}
TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == count);
TEST_VERIFY_EXIT (count <= dyn.u.dynarray_header.allocated);
if (count > 0)
{
TEST_VERIFY (dynarray_int_begin (&dyn)
== dynarray_int_at (&dyn, 0));
TEST_VERIFY (dynarray_int_end (&dyn)
== dynarray_int_at (&dyn, count - 1) + 1);
}
unsigned final_count;
bool heap_array = dyn.u.dynarray_header.array != dyn.scratch;
if (do_remove_last)
{
dynarray_int_remove_last (&dyn);
if (count == 0)
final_count = 0;
else
final_count = count - 1;
}
else
final_count = count;
if (final_count > 0)
{
TEST_VERIFY (dynarray_int_begin (&dyn)
== dynarray_int_at (&dyn, 0));
TEST_VERIFY (dynarray_int_end (&dyn)
== dynarray_int_at (&dyn, final_count - 1) + 1);
}
if (do_clear)
{
dynarray_int_clear (&dyn);
final_count = 0;
}
TEST_VERIFY_EXIT (!dynarray_int_has_failed (&dyn));
TEST_VERIFY_EXIT ((dyn.u.dynarray_header.array != dyn.scratch)
== heap_array);
TEST_VERIFY_EXIT (dynarray_int_size (&dyn) == final_count);
TEST_VERIFY_EXIT (dyn.u.dynarray_header.allocated
>= final_count);
if (!do_clear)
for (unsigned int i = 0; i < final_count; ++i)
TEST_VERIFY_EXIT (*dynarray_int_at (&dyn, i) == base + i);
if (do_finalize)
{
struct int_array result = { (int *) (uintptr_t) -1, -1 };
TEST_VERIFY_EXIT (dynarray_int_finalize (&dyn, &result));
CHECK_INIT_STATE (int, &dyn);
TEST_VERIFY_EXIT (result.length == final_count);
if (final_count == 0)
TEST_VERIFY_EXIT (result.array == NULL);
else
{
TEST_VERIFY_EXIT (result.array != NULL);
TEST_VERIFY_EXIT (result.array != (int *) (uintptr_t) -1);
TEST_VERIFY_EXIT
(malloc_usable_size (result.array)
>= final_count * sizeof (result.array[0]));
for (unsigned int i = 0; i < final_count; ++i)
TEST_VERIFY_EXIT (result.array[i] == base + i);
free (result.array);
}
}
else /* !do_finalize */
{
dynarray_int_free (&dyn);
CHECK_INIT_STATE (int, &dyn);
}
}
}
/* Test dynamic arrays with char * elements (with automatic
deallocation of the pointed-to strings). */
static void
test_str (void)
{
/* Empty array. */
{
struct dynarray_str dyn;
dynarray_str_init (&dyn);
CHECK_EMPTY (str, &dyn);
}
/* Empty array with finalization. */
{
struct dynarray_str dyn;
dynarray_str_init (&dyn);
TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
struct str_array result = { (char **) (uintptr_t) -1, -1 };
TEST_VERIFY_EXIT (dynarray_str_finalize (&dyn, &result));
CHECK_INIT_STATE (str, &dyn);
TEST_VERIFY_EXIT (result.array == NULL);
TEST_VERIFY_EXIT (result.length == 0);
}
/* Non-empty array tests.
do_add: Switch between emplace (false) and add (true).
do_finalize: Perform finalize call at the end.
do_clear: Perform clear call at the end.
do_remove_last: Perform remove_last call after adding elements.
count: Number of elements added to the array. */
for (int do_add = 0; do_add < 2; ++do_add)
for (int do_finalize = 0; do_finalize < 2; ++do_finalize)
for (int do_clear = 0; do_clear < 2; ++do_clear)
for (int do_remove_last = 0; do_remove_last < 2; ++do_remove_last)
for (unsigned int count = 0; count < max_count; ++count)
{
if (do_remove_last && count == 0)
continue;
unsigned int base = count * count;
struct dynarray_str dyn;
dynarray_str_init (&dyn);
for (unsigned int i = 0; i < count; ++i)
{
char *item = xasprintf ("%d", base + i);
if (do_add)
dynarray_str_add (&dyn, item);
else
{
char **place = dynarray_str_emplace (&dyn);
TEST_VERIFY_EXIT (place != NULL);
TEST_VERIFY_EXIT (*place == NULL);
*place = item;
}
TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == i + 1);
TEST_VERIFY_EXIT (dynarray_str_size (&dyn)
<= dyn.u.dynarray_header.allocated);
}
TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == count);
TEST_VERIFY_EXIT (count <= dyn.u.dynarray_header.allocated);
if (count > 0)
{
TEST_VERIFY (dynarray_str_begin (&dyn)
== dynarray_str_at (&dyn, 0));
TEST_VERIFY (dynarray_str_end (&dyn)
== dynarray_str_at (&dyn, count - 1) + 1);
}
unsigned final_count;
bool heap_array = dyn.u.dynarray_header.array != dyn.scratch;
if (do_remove_last)
{
dynarray_str_remove_last (&dyn);
if (count == 0)
final_count = 0;
else
final_count = count - 1;
}
else
final_count = count;
if (final_count > 0)
{
TEST_VERIFY (dynarray_str_begin (&dyn)
== dynarray_str_at (&dyn, 0));
TEST_VERIFY (dynarray_str_end (&dyn)
== dynarray_str_at (&dyn, final_count - 1) + 1);
}
if (do_clear)
{
dynarray_str_clear (&dyn);
final_count = 0;
}
TEST_VERIFY_EXIT (!dynarray_str_has_failed (&dyn));
TEST_VERIFY_EXIT ((dyn.u.dynarray_header.array != dyn.scratch)
== heap_array);
TEST_VERIFY_EXIT (dynarray_str_size (&dyn) == final_count);
TEST_VERIFY_EXIT (dyn.u.dynarray_header.allocated
>= final_count);
if (!do_clear)
for (unsigned int i = 0; i < count - do_remove_last; ++i)
{
char *expected = xasprintf ("%d", base + i);
const char *actual = *dynarray_str_at (&dyn, i);
TEST_VERIFY_EXIT (strcmp (actual, expected) == 0);
free (expected);
}
if (do_finalize)
{
struct str_array result = { (char **) (uintptr_t) -1, -1 };
TEST_VERIFY_EXIT (dynarray_str_finalize (&dyn, &result));
CHECK_INIT_STATE (str, &dyn);
TEST_VERIFY_EXIT (result.length == final_count);
if (final_count == 0)
TEST_VERIFY_EXIT (result.array == NULL);
else
{
TEST_VERIFY_EXIT (result.array != NULL);
TEST_VERIFY_EXIT (result.array
!= (char **) (uintptr_t) -1);
TEST_VERIFY_EXIT (result.length
== count - do_remove_last);
TEST_VERIFY_EXIT
(malloc_usable_size (result.array)
>= final_count * sizeof (result.array[0]));
for (unsigned int i = 0; i < count - do_remove_last; ++i)
{
char *expected = xasprintf ("%d", base + i);
char *actual = result.array[i];
TEST_VERIFY_EXIT (strcmp (actual, expected) == 0);
free (expected);
free (actual);
}
free (result.array);
}
}
else /* !do_finalize */
{
dynarray_str_free (&dyn);
CHECK_INIT_STATE (str, &dyn);
}
}
/* Test resizing. */
{
enum { count = 2131 };
struct dynarray_str dyn;
dynarray_str_init (&dyn);
/* From length 0 to length 1. */
TEST_VERIFY (dynarray_str_resize (&dyn, 1));
TEST_VERIFY (dynarray_str_size (&dyn) == 1);
TEST_VERIFY (*dynarray_str_at (&dyn, 0) == NULL);
*dynarray_str_at (&dyn, 0) = xstrdup ("allocated");
dynarray_str_free (&dyn);
/* From length 0 to length 1 and 2. */
TEST_VERIFY (dynarray_str_resize (&dyn, 1));
TEST_VERIFY (dynarray_str_size (&dyn) == 1);
TEST_VERIFY (*dynarray_str_at (&dyn, 0) == NULL);
*dynarray_str_at (&dyn, 0) = xstrdup ("allocated0");
TEST_VERIFY (dynarray_str_resize (&dyn, 2));
TEST_VERIFY (dynarray_str_size (&dyn) == 2);
TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
TEST_VERIFY (*dynarray_str_at (&dyn, 1) == NULL);
*dynarray_str_at (&dyn, 1) = xstrdup ("allocated1");
TEST_VERIFY (dynarray_str_resize (&dyn, count));
TEST_VERIFY (dynarray_str_size (&dyn) == count);
TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 1), "allocated1") == 0);
for (int i = 2; i < count; ++i)
TEST_VERIFY (*dynarray_str_at (&dyn, i) == NULL);
*dynarray_str_at (&dyn, count - 1) = xstrdup ("allocated2");
TEST_VERIFY (dynarray_str_resize (&dyn, 3));
TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 0), "allocated0") == 0);
TEST_VERIFY (strcmp (*dynarray_str_at (&dyn, 1), "allocated1") == 0);
TEST_VERIFY (*dynarray_str_at (&dyn, 2) == NULL);
dynarray_str_free (&dyn);
}
}
/* Verify that DYNARRAY_ELEMENT_INIT has an effect. */
static void
test_long_init (void)
{
enum { count = 2131 };
{
struct dynarray_long dyn;
dynarray_long_init (&dyn);
for (int i = 0; i < count; ++i)
{
long *place = dynarray_long_emplace (&dyn);
TEST_VERIFY_EXIT (place != NULL);
TEST_VERIFY (*place == 17);
}
TEST_VERIFY (dynarray_long_size (&dyn) == count);
for (int i = 0; i < count; ++i)
TEST_VERIFY (*dynarray_long_at (&dyn, i) == 17);
dynarray_long_free (&dyn);
TEST_VERIFY (dynarray_long_resize (&dyn, 1));
TEST_VERIFY (dynarray_long_size (&dyn) == 1);
TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
*dynarray_long_at (&dyn, 0) = 18;
dynarray_long_free (&dyn);
TEST_VERIFY (dynarray_long_resize (&dyn, 1));
TEST_VERIFY (dynarray_long_size (&dyn) == 1);
TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
TEST_VERIFY (dynarray_long_resize (&dyn, 2));
TEST_VERIFY (dynarray_long_size (&dyn) == 2);
TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 17);
TEST_VERIFY (*dynarray_long_at (&dyn, 1) == 17);
*dynarray_long_at (&dyn, 0) = 18;
TEST_VERIFY (dynarray_long_resize (&dyn, count));
TEST_VERIFY (dynarray_long_size (&dyn) == count);
TEST_VERIFY (*dynarray_long_at (&dyn, 0) == 18);
for (int i = 1; i < count; ++i)
TEST_VERIFY (*dynarray_long_at (&dyn, i) == 17);
dynarray_long_free (&dyn);
}
/* Similar, but without an on-stack scratch region
(DYNARRAY_INITIAL_SIZE is 0). */
{
struct dynarray_long_noscratch dyn;
dynarray_long_noscratch_init (&dyn);
struct long_array result;
TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
TEST_VERIFY (result.array == NULL);
TEST_VERIFY (result.length == 0);
/* Test with one element. */
{
long *place = dynarray_long_noscratch_emplace (&dyn);
TEST_VERIFY_EXIT (place != NULL);
TEST_VERIFY (*place == 23);
}
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
TEST_VERIFY_EXIT (result.array != NULL);
TEST_VERIFY (result.length == 1);
TEST_VERIFY (result.array[0] == 23);
free (result.array);
for (int i = 0; i < count; ++i)
{
long *place = dynarray_long_noscratch_emplace (&dyn);
TEST_VERIFY_EXIT (place != NULL);
TEST_VERIFY (*place == 23);
if (i == 0)
*place = 29;
}
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == count);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 29);
for (int i = 1; i < count; ++i)
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, i) == 23);
TEST_VERIFY_EXIT (dynarray_long_noscratch_finalize (&dyn, &result));
TEST_VERIFY_EXIT (result.array != NULL);
TEST_VERIFY (result.length == count);
TEST_VERIFY (result.array[0] == 29);
for (int i = 1; i < count; ++i)
TEST_VERIFY (result.array[i] == 23);
free (result.array);
TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 1));
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
*dynarray_long_noscratch_at (&dyn, 0) = 24;
dynarray_long_noscratch_free (&dyn);
TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 1));
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 1);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, 2));
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == 2);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 23);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 1) == 23);
*dynarray_long_noscratch_at (&dyn, 0) = 24;
TEST_VERIFY (dynarray_long_noscratch_resize (&dyn, count));
TEST_VERIFY (dynarray_long_noscratch_size (&dyn) == count);
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, 0) == 24);
for (int i = 1; i < count; ++i)
TEST_VERIFY (*dynarray_long_noscratch_at (&dyn, i) == 23);
dynarray_long_noscratch_free (&dyn);
}
}
/* Test overflow in resize. */
static void
test_long_overflow (void)
{
{
struct dynarray_long dyn;
dynarray_long_init (&dyn);
errno = EINVAL;
DIAG_PUSH_NEEDS_COMMENT;
/* GCC 12 (on 32-bit platforms) warns that after inlining, a loop
iteration would invoke undefined behavior. That loop iteration
can never be executed because an allocation of this size must
fail. */
DIAG_IGNORE_NEEDS_COMMENT (12, "-Waggressive-loop-optimizations");
TEST_VERIFY (!dynarray_long_resize
(&dyn, (SIZE_MAX / sizeof (long)) + 1));
DIAG_POP_NEEDS_COMMENT;
TEST_VERIFY (errno == ENOMEM);
TEST_VERIFY (dynarray_long_has_failed (&dyn));
}
{
struct dynarray_long_noscratch dyn;
dynarray_long_noscratch_init (&dyn);
errno = EINVAL;
DIAG_PUSH_NEEDS_COMMENT;
/* GCC 12 (on 32-bit platforms) warns that after inlining, a loop
iteration would invoke undefined behavior. That loop iteration
can never be executed because an allocation of this size must
fail. */
DIAG_IGNORE_NEEDS_COMMENT (12, "-Waggressive-loop-optimizations");
TEST_VERIFY (!dynarray_long_noscratch_resize
(&dyn, (SIZE_MAX / sizeof (long)) + 1));
DIAG_POP_NEEDS_COMMENT;
TEST_VERIFY (errno == ENOMEM);
TEST_VERIFY (dynarray_long_noscratch_has_failed (&dyn));
}
}
/* Test NUL-terminated string construction with the add function and
the simple finalize function. */
static void
test_zstr (void)
{
/* Totally empty string (no NUL termination). */
{
struct zstr s;
zstr_init (&s);
char *result = zstr_finalize (&s, NULL);
TEST_VERIFY (result == NULL);
TEST_VERIFY (zstr_size (&s) == 0);
size_t length = 1;
result = zstr_finalize (&s, &length);
TEST_VERIFY (result == NULL);
TEST_VERIFY (length == 0);
TEST_VERIFY (zstr_size (&s) == 0);
}
/* Empty string. */
{
struct zstr s;
zstr_init (&s);
zstr_add (&s, '\0');
char *result = zstr_finalize (&s, NULL);
TEST_VERIFY_EXIT (result != NULL);
TEST_VERIFY (*result == '\0');
TEST_VERIFY (zstr_size (&s) == 0);
free (result);
zstr_add (&s, '\0');
size_t length = 1;
result = zstr_finalize (&s, &length);
TEST_VERIFY_EXIT (result != NULL);
TEST_VERIFY (*result == '\0');
TEST_VERIFY (length == 1);
TEST_VERIFY (zstr_size (&s) == 0);
free (result);
}
/* A few characters. */
{
struct zstr s;
zstr_init (&s);
zstr_add (&s, 'A');
zstr_add (&s, 'b');
zstr_add (&s, 'c');
zstr_add (&s, '\0');
char *result = zstr_finalize (&s, NULL);
TEST_VERIFY_EXIT (result != NULL);
TEST_VERIFY (strcmp (result, "Abc") == 0);
TEST_VERIFY (zstr_size (&s) == 0);
free (result);
zstr_add (&s, 'X');
zstr_add (&s, 'y');
zstr_add (&s, 'z');
zstr_add (&s, '\0');
size_t length = 1;
result = zstr_finalize (&s, &length);
TEST_VERIFY_EXIT (result != NULL);
TEST_VERIFY (strcmp (result, "Xyz") == 0);
TEST_VERIFY (length == 4);
TEST_VERIFY (zstr_size (&s) == 0);
free (result);
}
}
static int
do_test (void)
{
mtrace ();
test_int ();
test_str ();
test_long_init ();
test_long_overflow ();
test_zstr ();
return 0;
}
#include <support/test-driver.c>
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