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Add internal facility for dynamic array handling

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This is intended as a type-safe alternative to obstacks and
hand-written realloc constructs.  The implementation avoids
writing function pointers to the heap.
This commit is contained in:
Florian Weimer
2017-06-02 11:59:28 +02:00
parent 09103e4025
commit 91b6eb1140
21 changed files with 2538 additions and 2 deletions
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125
malloc/tst-dynarray-at-fail.c Normal file
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/* Test reporting of out-of-bounds access for dynamic arrays.
Copyright (C) 2017 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
<http://www.gnu.org/licenses/>. */
#include "tst-dynarray-shared.h"
#include <signal.h>
#include <stdint.h>
#include <string.h>
#include <support/capture_subprocess.h>
#include <support/check.h>
/* Run CALLBACK and check that the data on standard error equals
EXPECTED. */
static void
check (const char *test, void (*callback) (void *), size_t index,
const char *expected)
{
struct support_capture_subprocess result
= support_capture_subprocess (callback, &index);
if (strcmp (result.err.buffer, expected) != 0)
{
support_record_failure ();
printf ("error: test %s (%zu) unexpected standard error data\n"
" expected: %s\n"
" actual: %s\n",
test, index, expected, result.err.buffer);
}
TEST_VERIFY (strlen (result.out.buffer) == 0);
TEST_VERIFY (WIFSIGNALED (result.status));
if (WIFSIGNALED (result.status))
TEST_VERIFY (WTERMSIG (result.status) == SIGABRT);
support_capture_subprocess_free (&result);
}
/* Try indexing an empty array. */
static void
test_empty (void *closure)
{
size_t *pindex = closure;
struct dynarray_int dyn;
dynarray_int_init (&dyn);
dynarray_int_at (&dyn, *pindex);
}
/* Try indexing a one-element array. */
static void
test_one (void *closure)
{
size_t *pindex = closure;
struct dynarray_int dyn;
dynarray_int_init (&dyn);
TEST_VERIFY (dynarray_int_resize (&dyn, 1));
dynarray_int_at (&dyn, *pindex);
}
/* Try indexing a longer array. */
static void
test_many (void *closure)
{
size_t *pindex = closure;
struct dynarray_int dyn;
dynarray_int_init (&dyn);
TEST_VERIFY (dynarray_int_resize (&dyn, 5371));
dynarray_int_at (&dyn, *pindex);
}
/* (size_t) -1 for use in string literals. */
#if SIZE_WIDTH == 32
# define MINUS_1 "4294967295"
#elif SIZE_WIDTH == 64
# define MINUS_1 "18446744073709551615"
#else
# error "unknown value for SIZE_WIDTH"
#endif
static int
do_test (void)
{
TEST_VERIFY (setenv ("LIBC_FATAL_STDERR_", "1", 1) == 0);
check ("test_empty", test_empty, 0,
"Fatal glibc error: array index 0 not less than array length 0\n");
check ("test_empty", test_empty, 1,
"Fatal glibc error: array index 1 not less than array length 0\n");
check ("test_empty", test_empty, -1,
"Fatal glibc error: array index " MINUS_1
" not less than array length 0\n");
check ("test_one", test_one, 1,
"Fatal glibc error: array index 1 not less than array length 1\n");
check ("test_one", test_one, 2,
"Fatal glibc error: array index 2 not less than array length 1\n");
check ("test_one", test_one, -1,
"Fatal glibc error: array index " MINUS_1
" not less than array length 1\n");
check ("test_many", test_many, 5371,
"Fatal glibc error: array index 5371"
" not less than array length 5371\n");
check ("test_many", test_many, 5372,
"Fatal glibc error: array index 5372"
" not less than array length 5371\n");
check ("test_many", test_many, -1,
"Fatal glibc error: array index " MINUS_1
" not less than array length 5371\n");
return 0;
}
#include <support/test-driver.c>