1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
|
/* Test driver for malloc interposition tests.
Copyright (C) 2016-2018 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; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if INTERPOSE_THREADS
#include <pthread.h>
#endif
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
/* Fills BUFFER with a test string. */
static void
line_string (int number, char *buffer, size_t length)
{
for (size_t i = 0; i < length - 2; ++i)
buffer[i] = 'A' + ((number + i) % 26);
buffer[length - 2] = '\n';
buffer[length - 1] = '\0';
}
/* Perform the tests. */
static void *
run_tests (void *closure)
{
char *temp_file_path;
int fd = create_temp_file ("tst-malloc-interpose", &temp_file_path);
if (fd < 0)
_exit (1);
/* Line lengths excluding the line terminator. */
static const int line_lengths[] = { 0, 45, 80, 2, 8201, 0, 17, -1 };
/* Fill the test file with data. */
{
FILE *fp = fdopen (fd, "w");
for (int lineno = 0; line_lengths[lineno] >= 0; ++lineno)
{
char buffer[line_lengths[lineno] + 2];
line_string (lineno, buffer, sizeof (buffer));
fprintf (fp, "%s", buffer);
}
if (ferror (fp))
{
printf ("error: fprintf: %m\n");
_exit (1);
}
if (fclose (fp) != 0)
{
printf ("error: fclose: %m\n");
_exit (1);
}
}
/* Read the test file. This tests libc-internal allocation with
realloc. */
{
FILE *fp = fopen (temp_file_path, "r");
char *actual = NULL;
size_t actual_size = 0;
for (int lineno = 0; ; ++lineno)
{
errno = 0;
ssize_t result = getline (&actual, &actual_size, fp);
if (result == 0)
{
printf ("error: invalid return value 0 from getline\n");
_exit (1);
}
if (result < 0 && errno != 0)
{
printf ("error: getline: %m\n");
_exit (1);
}
if (result < 0 && line_lengths[lineno] >= 0)
{
printf ("error: unexpected end of file after line %d\n", lineno);
_exit (1);
}
if (result > 0 && line_lengths[lineno] < 0)
{
printf ("error: no end of file after line %d\n", lineno);
_exit (1);
}
if (result == -1 && line_lengths[lineno] == -1)
/* End of file reached as expected. */
break;
if (result != line_lengths[lineno] + 1)
{
printf ("error: line length mismatch: expected %d, got %zd\n",
line_lengths[lineno], result);
_exit (1);
}
char expected[line_lengths[lineno] + 2];
line_string (lineno, expected, sizeof (expected));
if (strcmp (actual, expected) != 0)
{
printf ("error: line mismatch\n");
printf ("error: expected: [[%s]]\n", expected);
printf ("error: actual: [[%s]]\n", actual);
_exit (1);
}
}
if (fclose (fp) != 0)
{
printf ("error: fclose (after reading): %m\n");
_exit (1);
}
}
free (temp_file_path);
/* Make sure that fork is working. */
pid_t pid = fork ();
if (pid == -1)
{
printf ("error: fork: %m\n");
_exit (1);
}
enum { exit_code = 55 };
if (pid == 0)
_exit (exit_code);
int status;
int ret = waitpid (pid, &status, 0);
if (ret < 0)
{
printf ("error: waitpid: %m\n");
_exit (1);
}
if (!WIFEXITED (status) || WEXITSTATUS (status) != exit_code)
{
printf ("error: unexpected exit status from child process: %d\n",
status);
_exit (1);
}
return NULL;
}
/* This is used to detect if malloc has not been successfully
interposed. The interposed malloc does not use brk/sbrk. */
static void *initial_brk;
__attribute__ ((constructor))
static void
set_initial_brk (void)
{
initial_brk = sbrk (0);
}
/* Terminate the process if the break value has been changed. */
__attribute__ ((destructor))
static void
check_brk (void)
{
void *current = sbrk (0);
if (current != initial_brk)
{
printf ("error: brk changed from %p to %p; no interposition?\n",
initial_brk, current);
_exit (1);
}
}
static int
do_test (void)
{
check_brk ();
#if INTERPOSE_THREADS
pthread_t thr = xpthread_create (NULL, run_tests, NULL);
xpthread_join (thr);
#else
run_tests (NULL);
#endif
check_brk ();
return 0;
}
|